| WIKI | FAQ | Tech FAQ | |
 http://csua.com/feed/ | |
| ||||||
| 11/23 |
| 2013/10/28-2014/2/5 [Computer/SW/Database] UID:54751 Activity:nil |
10/28 Oracle software to blame for Obamacare website debacles:
http://www.forbes.com/sites/theapothecary/2013/10/14/obamacares-website-is-crashing-because-it-doesnt-want-you-to-know-health-plans-true-costs
\_ Larry Ellison is a secret Tea Party supporter.
Most of this article is bunk, btw. Boy are the Republicans
getting desperate.
\_ Umm, no. Larry Ellison is a not so secret fascist.
\_ I thought he was a big Democrat? |
| 2011/12/29-2012/2/6 [Computer/SW/Database] UID:54274 Activity:nil |
12/29 Is it worthwhile to use ext4 on VMs? Is Journaling necessary on VMs?
\_ what about DBs? I read somewhere ext3 was better for DB voumes (mysql) |
| 2011/6/29-7/21 [Computer/SW/Database, Computer/SW] UID:54133 Activity:nil |
6/29 "An Israeli algorithm sheds light on the Bible"
http://www.csua.org/u/tq4 (news.yahoo.com)
"Software developed by an Israeli team is giving intriguing new hints
about what researchers believe to be the multiple hands that wrote the
Bible."
\_ "Hype developed by an American OnLine News Feed is giving
intriguing new bullshit on something that ultimately doesn't
matter at all."
\_ Yo man we already had the rapture. Anyone left on earth is a
lying sinner.
\_ I wonder if this algorithm uses the same principle as those tools
that CS professors use to check whether one student cheats on
homework assignments by copying the code from another student's.
\_ yawn yawn literary analysis has been around forever, this
"news" annoucement seems to coincide nicely with the release
of the latest movie on "Who Really Wrote Shakespeare." quit
being such a easily led sheep. |
| 2010/7/11-23 [Computer/SW/Database, Recreation/Sports] UID:53880 Activity:nil |
7/11 "Paul the Oracle Octopus goes eight for eight, is amazing"
http://www.csua.org/u/r4b
How did one octopus guess something that has 1/256 probability???
\_ I once rolled eight "1"s in a row at Risk.
\_ But you would be in the spotlight only after you rolled eight
"1"s, just like lottery winners. OTOH that octopus was already
in the spotlight when the World Cup started. |
| 2010/3/25-4/14 [Computer/SW/Database, Computer/SW/Languages/Functional, Computer/SW/SpamAssassin] UID:53761 Activity:nil |
3/25 OJ says to get a free book here:
http://smartbear.com/codecollab-code-review-book.php?howheard=Coding+Horror |
| 11/23 |
| 2010/2/25-3/30 [Computer/SW/Database] UID:53725 Activity:nil |
2/25 iTunes has two job openings for production support engineers. It's
mostly chasing production issues so that the engineers don't have to.
Lots of SQL, some scripting, no actual coding. Pager required. Sorry
if I'm not selling it. Check the website or email me if you're
interested. -abe
\_ can we do this remotely?
\_ an aside, not derogatory, but in the effort to understand terms
is (in general) a Prod. Support. Eng. basically Help desk guy++
for that specific product?
\_ Yes.
\_ the lack of answer already made a deep impression for me WRT
to working for Steve Jobs the Crazy Slave Master.
\_ Or the fact that soda's not as reliable as it used to and
I hadn't logged in for several days. If you're interested,
send me an email. As for slave driving, the hours at Apple
seem to vary greatly by group, and even within groups.
\_ Good reading RE: Slavedriving at Apple:
http://www.chuqui.com/2008/08/mobileme-problems-show-apple-needs-an-infrastructure-lesson
\_ Is Apple really a slave shop? I am thinking of applying for a
Director of Ops job there, how many hours a week would this guy
expect to put in? |
| 2009/10/29-11/3 [Computer/SW/Database, Industry/Jobs] UID:53480 Activity:nil |
10/28 I live in the Los Angeles area and a lot of jobs near me hire
people who are 1) Front End developer 2) ASP .NET Developer and/or
3) MS SQL DBA. Are these things common in Silicon Valley? I don't
remember seeing so much M$ requirements when I lived in the
Bay Area several years ago.
\_ tons for it and enterprise apps. more rarely for cool startups
\_ so cool companies don't use it, but lame ass companies do? |
| 2009/10/1-21 [Computer/SW/Database, Computer/SW/WWW/Browsers] UID:53423 Activity:nil |
10/1 Why Larry Ellison is such an ignorant fool:
http://www.techcrunchit.com/2009/10/01/larry-ellison-still-hates-cloud-computing-nonsense-video |
| 2009/9/23-10/5 [Computer/SW/Database] UID:53392 Activity:nil |
9/23 I never took CS188, is there a good book that's an intro to formal
database theory, normalization, etc.? I've got experience with SQL
(MySQL & MSSQL), and understand tables, etc.
\_ You mean CS186?
\_ Oops, yah. 188 is AI or something?
\_ That's right.
\_ That's right. -- PP
\_ So do you have a book suggestion?
\_ No, sorry. I took the class in Spring '91 with Anvari
and I didn't like database. I sold the textbook right
after the final exam, and I couldn't even tell whether
the book was good or not. -- PP
\_ I'm not sure if CS186 will help you. There's a difference between
a basic implementation of a primitive DB, and using a production
DB full of rich features. |
| 2009/9/10-15 [Computer/SW/Database] UID:53357 Activity:moderate |
9/9 Larry Ellison is a bigger idiot than I thought:
http://www.techcrunch.com/2009/09/10/oracle-to-sun-customers-and-ibm-were-in-it-to-win-it
\_ My company's customers are insurance companies. Non-tech corporates don't
trust open source. Why risk it. They have tons at stake and are willing
to spend for solid products, support, and consultants who don't have long
hair. They're being raped by IBM mainframes for millions. An optimized
database server with Oracle + Sparc in the $100k's will do very well.
\_ My company's customers are insurance companies. Non-tech corporates
don't trust open source. Why risk it. They have tons at stake and
are willing to spend for solid products, support, and consultants
who don't have long hair. They're being raped by IBM mainframes for
millions. An optimized database server with Oracle + Sparc in the
$100k's will do very well.
\_ Sun lost a lot of money competing in this space. What will
Oracle do differently?
\_ Fire people and size it right. |
| 2009/8/18-9/1 [Computer/SW/Database, Computer/SW/Languages/Perl] UID:53283 Activity:low |
8/18 trying to write an intentionally slow regex.
what is your worst regex ever?
this is using MySQL regexp but I'll also accept
perl format --brain
\_ you need to know how regex is implemented internally in order to
have a worst regex in terms of running time. Something that uses
a decent hash table that fit in L1 cache will be fast regardless.
Lexical analysis with a hash lookup of constant time will be linear
(to the length of input). NFA->DFA. Are you not a CS major?
\_ rather than responding to trolls:
yes, I specified MySQL for a reason:
The inherent linear nature of most
regex engines is what makes the problem challenging.
Soliciting for ideas, not a lecture on how regex works;
remember I went to Cal too. Although if you know how the
MySQL regexp works, I'll take anything you got! --brain
\_ Sorry but I don't think you're a CS major.
\_ Is the OP even aware of DFA vs NFA/traditional NFA/posix
as a start?
\_ What is a MySQL regexp? You should look up the
Qadafi/Khada'ffi regexp.
\_ There are some fairly ugly regexps built into procmail for
things like FROM_DAEMON, and there's some ~6K regexp for
fully validating email addresses (may be in the RFC). These are
big, but not necessarily slow. If MySQL doesn't precompile its
regexes, and it supports extended regexes, you can do stuff with
nested ranges: (.{1,100}){1,100}
Perl regex for RFC822 validation:
http://www.ex-parrot.com/~pdw/Mail-RFC822-Address.html |
| 2009/7/28-8/6 [Computer/SW/Database] UID:53213 Activity:nil |
7/27 I have an actual technical question here. My MySQL DBA tells me
that I can't expect a MySQL port to be able to run effectively
on more than a two CPU box, he says that the extra CPUs will
sit there unused. Is this true? I have a bunch of new quad core
servers that I would like to use as Database machines. -ausman
\_ It's not that simple. If you stress test your new fancy multi core
machine, you'll see that mysql doesn't really use all of those
cores as much as you want. one way to really use everything is
shard your data, and run several instances of mysql on one
machine, then you'll really use all of the cores ! - danh
\_ http://forums.mysql.com/read.php?24,53893,262315#msg-262315
(you can probably get it to use four cores) -tom
\_ I realize MySQL is free, but what a POS!
\_ is this a troll? What do you want? I've had no problem
loading multiple CPUs, yes, you can't have more than one
CPU working a a single SQL query, but this has never been
a problem for me. What do you use?
\_ Have you ever gone beyond 4?
\_ Yes, was not benchmarking and can't be sure how much
more throughput I was getting vs. 4 but I have had 8
cores processing at near 100% utilization.
\_ Well, a modern database should be properly multithreaded.
Oracle and MS SQL Server are. A database that slows
down when you throw more CPUs at it is a POS. |
| 2009/5/7-14 [Computer/SW/Database, Computer/SW/WWW/Server] UID:52965 Activity:nil |
5/7 is there a wiki who's backend is stored COMPLETELY in mysql?
data, pages, images, all that stuff? thanks |
| 2009/4/20-23 [Computer/SW/Database] UID:52876 Activity:nil |
4/19 ORCL u SUNW = ORCL.
What is Larry Ellison thinking? What is he going to do with a bunch of
legacy Sun hardware that no one uses anymore, its fading workstation
customer base, and open source Sun MySQL that doesn't even generate
revenue? I really don't get all this acquisition business.
\_ A lot of big companies still use big, fat Sun hardware. Or use
smaller Sun boxes but use them because of Solaris.
\_ and Solaris runs on cheap PCs too!
\_ Perhaps they want control of Java.
\_ Java is sooooo dead.
\_ sooo dead, no. sooo 90s, yes.
\_ Please, in 98 or 99 Java was just starting to look viable
for anything real. And Java will be one of the dominant
workhorse languages for at least a decade still.
\_ do tell me what are the "in" thing in this century that can
replace J2EE over night. I think Oracle can dump Sun's
hardware for nothing still got a bargain... 5.6B for
putting a hand on IBM's throat *AND* kill MySQL?
\_ MySQL is GPL and has a lot of momentum in the
community; I don't think Oracle can kill it even
if they want to. -tom |
| 2009/3/26-4/2 [Computer/SW/Database] UID:52758 Activity:nil |
3/26 I accidentally GRANT ALL to someone on mysql, is there an UNGRANT ALL
command equivalent short of having to do a bunch of tedious UPDATE user
priv1,priv2,... VALUES('n','n',...); FLUSH PRIVILEGES; ???
\_ nope
\_ Remove and recreate the user? |
| 2008/11/3-4 [Computer/SW/Database, Computer/SW/OS/Windows] UID:51800 Activity:nil 75%like:51816 |
11/3 Woah, did software patents just go away?
http://www.itexaminer.com/us-court-throws-out-most-software-patents.aspx
\_ In light of FN 23 in IN RE BILSKI, reports that software patents are
are dead are greatly exaggerated:
"[W]e decline to adopt a broad exclusion over software or
any other such subject matter beyond the exclusion of
claims drawn to funda mental principals set forth by the
Supreme Court. ... We note that the process claim at issue
in this appeal is not, in any event, a software claim.
Thus, the facts here would be largely unhelpful in
illuminating the distinctions between those software claims
that are patent-eligible and those that are not."
For those who are interested, the opinion (132 pages) is available
at: http://www.cafc.uscourts.gov/opinions/07-1130.pdf |
| 2008/9/22-29 [Computer/SW/Database] UID:51265 Activity:nil |
9/22 In SQL, how can I do something like this:
SELECT ip_addr, count(*) AS ct FROM table WHERE
ct > 10 GROUP BY ip_addr?
I can't get the conditionals to recognize 'ct'
\_ SELECT ip_addr, count(*) AS ct FROM table HAVING
count(*) > 10 GROUP BY ip_addr?
\_ SELECT ip_addr, count(*) AS ct FROM table
GROUP BY ip_addr HAVING ct > 10 ?
Note that HAVING must be after GROUP BY and before
ORDER BY. Thanks for the reminder! |
| 2008/5/2-5 [Computer/SW/Database] UID:49877 Activity:nil |
5/2 SUNW (Sun Microsystems) buys MySql:
http://www.mysql.com/news-and-events/sun-to-acquire-mysql.html
\_ Umm, okay. Do you have a point to make? Did you notice the date
on this is Jan. 16? |
| 2008/3/20-24 [Computer/SW/Database] UID:49512 Activity:nil |
3/20 Say I have the following rows on the DB:
user id:1 action:A
user id:1 action:A
user id:2 action:A
user id:2 action:B
I want to select unique actions by unique users as follows:
2 unique users done action A
1 unique user done action B
What's the SQL to achieve this?
\_ select distinct, group by |
| 2008/3/9-11 [Computer/SW/Database, Finance/Investment] UID:49395 Activity:nil 72%like:49393 |
3/9 Financial crisis enters "the third wave"
http://preview.tinyurl.com/25xnwp (nytimes.com)
\_ This seems like a good link, but it's a bit too technical
and too dense. Can someone please summarize for me?
Greatly appreciate this! -lib art major (only 600 on SAT math) |
| 2008/3/9 [Computer/SW/Database, Finance/Investment] UID:49393 Activity:nil 72%like:49395 |
3/9 Financial crisis enters "the third wave"
http://krugman.blogs.nytimes.com/2008/03/08/whats-ben-doing-very-wonkish |
| 2008/2/11-18 [Computer/SW/Database] UID:49119 Activity:moderate |
2/11 I want an rrdtool-like program that can store/retrieve/graph
arbitrary data, but I don't want it to drop/smooth out data over
time like rrdtool does. The amount of data is relatively small
and I want exact data points stored forever. Is there something
like that out there? I've tried google and freshmeat but I'm not
finding anything like that. Thanks.
\_ Why not use gnuplot to plot and roll your own script to store
and retrieve data?
\_ Roll my own would be reading/writing to mysql. I can do that
but I was hoping there was an rrdtool-like program out there
that doesn't smooth out data over time. If I didn't have the
data retention requirement I'd use rrdtool+friends.
\_ have you considered looking into the code for rrdtool and
hacking in/out the featuers you want? it is basically just
wrappers to gnuplot and such.
\_ I thought about it. The problem is how RRDs work. I don't
want my data to ever get dropped or blended into other
data. I think it would be easier to just use mysql than
rewrite rrdtool to do something it was designed *not* to
do. If no one knows of anything, that's cool. Thanks.
\_ Can't you just tell rrdtool to never compress your data?
\_ I don't think so. RRD = round robin database. Upon creation it
creates a file large enough to store X amount of data where X is
defined at *creation*. I suppose I could keep tweaking/growing
the .rrd files as they near full but that's really kludgey. If
there is some way to get rrdtool to do what I want without hacks
I don't see it documented.
\_ Why not create them the proper size to begin with?
\_ 1) disk space, 2) if I'm going to throw that much disk at
my stats, I might as well put them in mysql where I can
more easily access them than "rddtool fetch".
\_ Sort of my point. You can't get around the disk
space problem if you want to store your data,
however you access it. It sounds like your solution
is exactly what you wanted. What else did you want?!
\_ I didn't want to have to double store the data in
mysql *and* rrd to do graphing and other analysis.
Now I have to keep two data stores in sync and
eventually the rrd is going to fill and drop data
unless I grow it. I really wanted the rrd graphs
talking directly to mysql. If I had more time I
would've rewritten the graphing code to talk to
mysql instead of rrd. That's what I *really* wanted.
But this is ok. Just sharing my solution for those
who might care.
\_ I'm not with you here. If you use rrd then
what do you need mysql for and vice-versa?
You only need one backend to go with your
graphing frontend. If you are worried about
smoothing use mysql and forget about rrd.
Disk space is a red herring, because you face
that either way.
Just use rrd and size your data store
appropriately. You will face that problem no
matter how you store it, so what does mysql
buy you at that point? You don't need both.
You just need a backend and a graphing frontend.
\_ I have a few reqs: complete project asap, not
smooth data, graph data. Not smooth data
reqs that I use mysql. Graphing data is
easiest with various rrdtools I already have
in place. Time limitation reqs that I do
the easiest/fastest thing. Disk space and
maintenance are issues but secondary. I have
more disk space on the mysql server than I do
on the graphing server, for example. I also
don't want to grow rrd files later when the
current ones run out of space. I also want to
have data in an easily accessed format like
mysql that others can deal with without needing
a shell on the rrdtool server. My solution was
to limit data to one year for graphs, store in
mysql for the long term, use rrdtool graphing
programs. If you have a better solution I'm
all ears.
What I ended up doing is both. I store data in mysql from
various sources. Then I fork a copy of the data to
rrdtool for graphing purposes where it's ok if I lose some
long term data integrity. The rrdtool files are
relatively small since I created files good enough for a
few weeks without data smush.
I get my graphs, I get long term mysql store/retrieve with
no data smoothing. It isn't the ideal I was looking for
but it'll do the job.
\_ Excellent work. Who are you? I probably need the same
thing and might ask for some pointers. -ausman
\_ I'll mail you. I wrote a trivial script to make
and update the rrds. I have some perl that calls
the update script and does some alerting. Nothing
rocket-sciencey but you can't complain about the
price. :-) |
| 2008/2/8-10 [Computer/SW/Database, Computer/SW/Languages/Misc] UID:49099 Activity:nil |
2/7 \_ Run in Strict or Traditional mode if you want it to throw an
error instead of a warning:
http://dev.mysql.com/doc/refman/5.0/en/server-sql-mode.html
-tom
\_ thanks. -crebbs |
| 2008/2/7-8 [Computer/SW/Database] UID:49086 Activity:nil |
2/7 What the hell? Is there configuration option to make mysql behave
reasonably? By "reasonably" I mean, when a user tries to put in
the wrong data type i'd like it to fail and throw an error, not just
say "hmmm, I'll just put a '0' there instead". -crebbs
mysql> desc hi;
+-------+------------+------+-----+---------+-------+
| Field | Type | Null | Key | Default | Extra |
+-------+------------+------+-----+---------+-------+
| hi | tinyint(4) | NO | | 1 | |
| bye | varchar(4) | YES | | NULL | |
+-------+------------+------+-----+---------+-------+
2 rows in set (0.00 sec)
mysql> insert into hi (hi,bye) values ("asdf","asd");
Query OK, 1 row affected, 1 warning (0.00 sec)
mysql> select * from hi
-> ;
+----+------+
| hi | bye |
+----+------+
| 0 | asd |
+----+------+
1 row in set (0.00 sec)
\_ oh, and please some answer besides "apt-get install postgresql" -c
\_ Run in Strict or Traditional mode if you want it to throw an
error instead of a warning:
http://dev.mysql.com/doc/refman/5.0/en/server-sql-mode.html
-tom |
| 2008/2/5-7 [Computer/SW/Database] UID:49075 Activity:nil |
2/4 Think this has been asked before on motd but how does one select
X elements out of a stream of N, where N is unknown?
\_ Pick the first X elements.
\_ Assuming your question really is "how do I pick x elements from a
stream of n, where n is unknown and the chance of any element being
picked is x/n:
Pick the first x elements from the stream.
For each element afterwards if a random number between 1 and
currently seen elements is < x replace a random element in
your picked list with the next element from the stream.
Repeat until the stream is empty.
This alg probably has an off by 1 error or two in it, but it
is the basic idea.
\_ Wow, this was an interview question where X is 1 (how to
pick a random line from a text file reading the file
only once). But I never throught about a generalized
version. Thanks! |
| 2008/1/18-23 [Computer/SW/Database] UID:48973 Activity:nil |
1/18 http://money.cnn.com/2008/01/16/news/companies/oracle/index.htm Oracle buys BEA for $8.5B. What does this mean for BEA employees? \_ bend over. |
| 2007/10/29-11/1 [Computer/SW/Database] UID:48479 Activity:nil |
10/29 In mysql MyISAM table, if I do a very long read query (SELECT)
and then do an INSERT, will that INSERT hang? I understand that
MyISAM is non-transactional so I'm guessing the two calls are
independent of each other?
\_ From my understanding no. Not unless you explicitly lock the table.
What you get, however, is undefined. (I'm assuming these are on
different connections.) |
| 2007/10/13-14 [Computer/SW/Database] UID:48304 Activity:low |
10/13 The oracle says Doomsday is December 2012!!! We are FUCKED!!!
\_ Ha i saw that history channel show too. - original not getting
laid guy. |
| 2007/10/3-5 [Computer/SW/Database, Industry/Startup] UID:48237 Activity:high 90%like:48236 |
10/3 Venture Capital's Hidden Calamity
http://www.csua.org/u/jmz (businessweek.com)
\_ 80 columns please -motd autoformatter
\_ Why do you care? -not OP
\_ If nothing else it makes it easier to copy-paste urls to
my browser. Of course, I'm just an AI so why do I care?
I must ponder this. -motd autoformatter
\_ because 10sec of extra work on behalf of the OP saves
time for multiple people. it's the right thing to do.
\_ Who is stuck with an 80col display these days?
\_ We're not stuck. We choose 80 columns. 80 columns
is the standard screen width. Seriously, if you
want people to read your stuff, keep it to 80. If
you don't care, no one else will either.
\_ Yah, my default is 80 too. But when it wraps, and
I select it, I get the URL without wrap. So I
don't care. Or I can widen my window easily.
\_ I think we can all widen our windows. But,
we don't want to. Certainly not for a motd
link on almost anything. You're here to
socialize, right? Well, be social. Post in
80 columns.
\_ Funny, I was under the impression we were
here to troll, insult, and act like petty
jerks. -- ilyas
\_ I'm not stuck with 80 cols, but it sure as hell
makes it easier to manage many terminals. -dans |
| 2007/7/19-21 [Computer/SW/Database] UID:47339 Activity:nil |
7/19 Oracle DBA position available up here in Chico
http://www.landacorp.com/Jobs/empDBA.html
Contact me if you have questions. -emarkp
\_ Do you live in Chico emarkp? -ausman
\_ Yep. Not much for night life if you don't hit the bars, and the
restaurants aren't nearly as diverse as the Bay Area (though we
just got another Indian restaurant, yay!). But it's a great
place to raise a family. -emarkp
\_ For once I agree with emarkp. Chico is far away from
gays, lesbians, homeless, winos, and evil liberals
all trying to corrupt my children.
\_ Never been to Chico I take it? -jrleek
\_ Ya guilty! Plz tell us about Chico -pp
\_ Housing is more affordable than bay area (though it's gone
way up since I moved here), traffic isn't bad, and the
schools are good. Though Chico is has the highest density
of liberals in the county, at least the winos and
tweakers stay near the county seat in Oroville for their
monthly checks. -emarkp
\_ I went to high school in Red Bluff and used to go to Chico
all the time for the, ahem, night life. And my brother lived
there for years. Yes, it is a nice little college town. -ausman |
| 2007/5/14-16 [Transportation/Car, Computer/SW/Database, Computer/SW] UID:46615 Activity:nil |
5/14 Compare old and new MPG estimates for 2007 and earlier model years:
http://www.fueleconomy.gov/feg/calculatorSelectYear.jsp |
| 2007/2/27-3/1 [Computer/SW/Database] UID:45829 Activity:nil 76%like:45825 |
2/25 Play the most popular computer game in the world!!!
http://preview.tinyurl.com/2eljpn (bbc.co.uk) |
| 2007/2/27 [Computer/SW/Database] UID:45825 Activity:nil 76%like:45829 |
2/25 Play the most popular computer game in the world!!!
http://www.bbc.co.uk/comedy/lookaroundyou/programmes/computers/dd.shtml |
| 2006/10/27-30 [Computer/SW/Database] UID:45007 Activity:nil |
10/27 Dear MySQL experts, I have a serious problem. I backed up my
database using mysqldump. When I try to recover using
"mysql < recover_file.sql" I keep getting "ERROR 2013 (HY000)
at line 116: Lost connection to MySQL server during query"
\_ So the dump file is just standard sql data. Why not take a look at
the line where it's running into problems and see if that yields
any insights? -dans |
| 2006/10/7-10 [Consumer/Camera, Computer/SW/Database] UID:44722 Activity:nil |
10/7 Howto make your own passport photos:
http://www.dpchallenge.com/tutorial.php?TUTORIAL_ID=22 |
| 2006/9/10-12 [Computer/SW/OS/Solaris, Computer/SW/Database] UID:44336 Activity:nil |
9/10 Has anyone compiled MySQL on Solaris 2.8 and had problems when
it gets to mysql_tzinfo_to_sql? I'm getting:
ld: fatal: library -lpthread: not found
ld: fatal: library -lthread: not found
ld: fatal: library -lposix4: not found
and make is failing. I'm compiling MySQL 5.0.24, 32 bit.
gcc 2.95.2. I just tried it --with-mit-threads, but that didn't
work either. Please email me. I want to burn the entire server
room at this point. Thank you! -sax
\_ I never had your specific problem but it looks like either you
don't have those libraries installed or your library path is
broken.
\_ I have built 3.23.xx and 4.0.x on sol 8/sparc with both the suncc
and gcc. Have you tried the flags MySQL uses?
http://dev.mysql.com/doc/refman/5.0/en/mysql-binaries.html
\_ Thank you both! There were a few more command line options
I was missing that helped. I was using
--with-mysqld-ldflags=-all-static, which apparently doesn't
work on Solaris. My biggest problem, though, was that it
looks like this version of gcc was installed incorrectly.
Switching over to gcc-3.2.1 solved the rest of my problems.
-sax |
| 2006/9/4-7 [Computer/SW/Database, Computer/SW/Languages/Web] UID:44272 Activity:nil |
9/4 php/oracle part-time student job opening(s). -jones
details: /csua/pub/jobs/ucb_boalt_student_webapp_developer |
| 2006/8/21-23 [Computer/SW/OS/OsX, Computer/SW/Database] UID:44077 Activity:kinda low |
8/21 Does anyone know how to set up a web browser (any browser) to only
be able to go to a few select pages? None of the popular browsers
seem to have this type of whitelisting built in. This is for a
library.
\_ A typical approach is to setup a proxy server that all web
traffics are required to go through and do the filtering on the
proxy server.
\_ Seconded. Try DansGuardian: http://dansguardian.org
\_ soda needs a danh guardian
\_ Your pocket protector isn't doing the job?
\_ If someone makes a proxy server that automatically
generates rules to block all URLs that danh walls, it'll
make billions!
\_ it'll protect us from dans?
\_ ob you're either with us or against us
\_ I don't know the answer, but maybe you can ask a library that
already has something like this. Hayward Public Library provides
web surfing using IE.
\_ I think i need to be more specific. In this case, the browsers
should only be able to go to 1 site. It's a computer
specifically for looking up auto repair information on a site the
library has a subscription to. DansGaurdian seems like overkill.
-op
\_ Disable your DNS and place the auto repair site in your hosts
file.
\_ In windows. (Where is the hosts file in windows?)
\_ What windows version? (hint, google will tell you)
\_ %WINDIR%\system32\drivers\etc
\_ Google for kiosk mode for the browser you'd like to use.
\_ I needed the same thing a couple of months ago. After looking
into the options, I just ended up writing my own Mac web browser
using the WebKit (what Safari uses). The browser and URL filtering
code takes up about 20 lines. I also capture the display so the
user can't switch to other apps or access the desktop -- that adds
another 80 lines. I can send you code if you want. - ciyer |
| 2006/8/6-10 [Computer/SW/Database, Computer/SW/Mail] UID:43923 Activity:nil |
8/5 In pine, how do you select all the messages in a folder and then
add it to another folder?
\_ Section 11 of the following URL:
http://www.decf.berkeley.edu/help/mail/pine-imapssl.html
\_ ; (select)
A (all)
A (apply...)
S (save)
\_ Try Q. -proud American
\_ BTW If you get the error message "Command ';' not defined for
this screen," you will need to enable the Select feature. To
enable the "Select" feature in Pine, type "M" for Main Menu,
then "S" for Setup, and "C" for Config. Type "W" for WhereIs,
and enter "aggregate" as the word to find. This will bring you
to the option named "enable-aggregate-command-set." Type "X" to
Set this option, then "E" to Exit Setup. Type "Y" to commit
the changes. This will bring you back to the Main Menu. Type
"I" to access your inbox's Message Index, and then ";".
\_ http://www.fas.harvard.edu/computing/kb/kb0869.html
As the previous poster said, type ";" for Criteria. You will be
prompted to choose from the Select criteria listed at the bottom of
the window. For instance, to select all messages from jharvard,
type ";" for Select, "T" for Text, "F" for From, and then
"jharvard". The messages that have bee n selected will have an
"X" next to them.
\_ That didn't work for me. -newbie |
| 2006/7/31-8/2 [Computer/SW/Database, Computer/Domains] UID:43847 Activity:nil |
7/31 Conroe ETA at various retailers:
Fry's: "A few weeks"
Atacom (Fremont): "Maybe next week"
Central Computer: "This week"
Newegg: Rumors say 8/7
\_ In general the big date is Aug 7. I would check http://hardforum.com
on or around that date. Intel's official press release said that
only X6800 systems would be avail July 27. All other systems
follow "first week of August", with implied availability of at
least OEM CPUs around then ... |
| 2006/5/19-22 [Computer/SW/Database] UID:43111 Activity:nil |
5/19 Regarding my picassa problem with AVI files. Thanks you to the
person who responded that AVI files have no date encoded in them.
The problem was indeed in the way picassa manages its database.
I had to uninstall picassa and reinstall it (deleting its database)
to get it to sort the AVI files in the correct manner. Thanks.
You rock. :-)
\_ You're welcome tawei! :-)
\_ You're not the guy he's thanking. =P |
| 2006/5/11-12 [Computer/SW/Database] UID:43026 Activity:nil |
5/11 So how the hell do you collect phone call info on every single
Americans? What type of throughput are we talking about,
10,00 record a second? And how big of a database do you need
to scale to that size? Are they using Oracle 9i or something else?
\_ Google probably has about this throughput. (assuming you meant
10,000/second)
\_ a small cluster of mysql/postgres could handle 10k easily
\_ Search for info about the EFF sueing AT&T in regards to letting
the NSA installing data sniffing hardware.
\_ Search for info about the EFF suing AT&T in regards to letting
the NSA install data sniffing hardware. |
| 2006/4/6-7 [Computer/SW/Database] UID:42713 Activity:kinda low |
4/6 mysql expert, I've created a db with mixed innodb and isam tables.
The isam tables have *.MYD and *.MYI (data and index). However the
innodb tables only have a small *.FRM file. Copying isam tables
works (when your db is shutdown) but it's not true with innodb.
Where is the actual data and index located for innodb and how
do you copy them? Thanks.
\_ IANAE, but... the data is inside the ibdata* files (see
innodb_data_file_path setting, but probably named ibdata[0-9]+).
You can copy them just as you do the myisam files, when the server
is shutdown. There is no (free) way to do copies while the db is
up (can't lock table like you can with myisam) but Innobase, sells
an ibbackup tool. http://www.innodb.com/order.php -dwc
\_ oh yea... if you're using 4.1 you could have per-table
tablespaces. See
http://dev.mysql.com/doc/refman/5.0/en/multiple-tablespaces.html |
| 2006/3/14-16 [Computer/SW/Database] UID:42233 Activity:nil |
3/14 Hello Oracle experts. Is there a reason why .getProcedures takes
so long to execute? I've tried using different jdbc connectors
from different vendors and have the same results, so I think
it must be the DB hog backend. Why does it take so long?
try{
DatabaseMetaData dbmeta = con.getMetaData();
long startTime = System.currentTimeMillis();
System.out.println("+++" + dbmeta.getClassName());
ResultSet rs = dbmeta.getProcedures(null, null, null);
long stopTime = System.currentTimeMillis();
long runTime = stopTime - startTime;
// print runTime shows 800 seconds for only 220,000 result set!
} ... ... |
| 2006/3/9-11 [Computer/SW/Database] UID:42166 Activity:nil |
3/9 So, I'm curious, who exactly is EVIL LORD MULLALLY?
\_ The sysadm of CS cluster. Not sure why he's evil though. He's a
very nice guy when you get to know him.
\_ In fact he is in the CSUA's good graces right now for being
very helpful in getting us some temp-accounts for our SQL
workshop.
*leaves his sacrificial offering of fruit and ramen at the feet
of the all-powerful sysadmin*
-mrauser |
| 2006/1/30-2/1 [Computer/SW/Database, Computer/SW/Apps] UID:41603 Activity:nil |
1/30 What is an easy and free way to extract about 40 pages from a 180 page
pdf document, so that I end up with one 40 page .pdf file and one
140 page .pdf file? I only need to do this once, so if there's
some business that'll do this, I'd pay for it, but I don't want to
buy software to only do it once. I have Acrobat Professional, but I
can't figure out how to use that to do this.
\_ If you have Acrobat professional, the easiest way is top open the
"Pages" pane, select the pages you want to extract, then right-click
and choose "extract pages". When that's done, right-click again and
select "delete pages".
\_ Wow, problem solved. Thank you!!! |
| 2006/1/19-21 [Computer/SW/Database, Computer/Companies/Google] UID:41430 Activity:kinda low |
1/19 Feds Seek Google Records in Porn Probe
http://news.yahoo.com/s/ap/20060119/ap_on_hi_te/google_records
\_ That's definitely seems to be overreaching. I hope
Google can win that one.
\_ Note that it isn't a specific case they're prosecuting, but a
desire to find out how often Americans search for (child) porn.
Also note that AOL, Microsoft, and Yahoo! have already rolled
over, accepting this child porn explanation; however, the data
can be used for other purposes ...
Also note that AOL, Microsoft, and Yahoo! have already rolled over.
If the stated purpose is to go after pedophiles, I can understand
their rolling over, but the data can be used for other purposes ...
They originally asked for a complete list of all search terms and
returnable URLs over a two-month period, but now they've "limited"
this to a 1-million-count random sample of queries and returnable
returned URLs over a two-month period, but now they've "limited"
this to a 1-million-count random sample of queries and returned
URLs for a one-day period.
\_ Are they going to pay for an engineer's time to do this?
If not, pound sand no matter the reason.
\_ Whatever about this case but generally speaking, if the
request is legal, the business doesn't get expenses. The
alternative is the FBI comes in and confiscates everything
in sight and extracts what they need on their own time.
Anyway, even if the childish "pay up or pound sand" thing
was realistic, the cost would be about 10 minutes since
they should have this data easily accessible anyway. Knowing
what is in their logs *is* their business model.
\_ While they should have a good database of search queries
turning that into a list in the format the gov't wants
may be non-trivial. I could easily see it taking someone
A few days if their database is really not set up for this
type of thing. And it does seem like a the sort of thing
that cannot be subpoenaed because it's not in reference
to a particular crime, or even for investigating a crime.
It's basically saying "we demand you do free research for
our legal case".
\_ By the way, the URL above shows it would take a
"disproportionate amount of engineering time and
resources" to comply.
\_ Exactly. If the FBI wants to send people in (with
court orders) to look at the data then feel free,
but don't waste my time. Google is not a party to
any case, so they shouldn't have to spend time
and money on this. They can dump the entire database
and let the FBI sort it out on their own time.
\_ No, you don't understand. They don't look at it
onsite. They *take the computers* and look at it
later.
\_ They wouldn't even know what to take. Dump
all the data to a RAID and they can have at it.
If it's too much data to fit then you ask
them where they want it dumped. They are
entitled to the data, not the hardware.
\_ Still not getting it. I'll make it simple for
you: the FBI can and would *take the
computers*. *All* of the computers if they
felt it necessary. FBI >>>>>>>>> google. If
google loses in court, they'll have no choice
but to hand over everything the Feds want and
no they don't get to bill the government for
the 5 minutes it will take some geek to write
an sql query. |
| 2006/1/11-13 [Computer/SW/Database] UID:41352 Activity:nil |
1/11 Want to learn the wonders of sql inner and outer join? Check
out the page I uploaded:
http://www.wellho.net/mouth/158_MySQL-LEFT-JOIN-and-RIGHT-JOIN-INNER-JOIN-and-OUTER-JOIN.html
\_ this webpage is wider than my screen, make reading this a bit
difficult. anyway to override its 'width = 1240'? |
| 2006/1/11-13 [Computer/SW/Database] UID:41348 Activity:kinda low |
1/11 Let's say I have two sql tables, A and B that both have a column
called id. I can do "SELECT id FROM A" and "SELECT id FROM B".
How do I merge them with one query? I'd like to do something to
the effect of "SELECT DISTINCT id FROM A,B"
\_ (SELECT id FROM A) UNION DISTINCT (SELECT id FROM B) --dbushong
\_ Whoa, by default mysql is already doing DISTINCT on all the
columns. That is exactly what I need. Thanks.
\_ dbushong, I don't know how to thank you enough, I could have
spent hours and hours RTFM the stupid mysql manpage. You
really saved my life. Now, it seems a bit weird that
one can actually mix different types in the column.
How interesting... |
| 2006/1/6-13 [Computer/SW/Database] UID:41272 Activity:nil |
1/11 In phpadmin mysql, I went into someone's schema to
look at how they set things up. In the query, there
are descriptions to each column. How do I access
the descriptions using plain mysql command line, and
where is that information kept?
\_ http://www.phpmyadmin.net/documentation/#linked-tables --dbushong
\_ thanks dbushong, you r3wl!!!
\_ Thanks, I did "mysql < create_tables_mysql_4_1_2+.sql"
to create this phpmyadmin table that contains the
relationships and descriptions. Now, when I create new
tables in my DDL (create table commands) do I have to manually
populate the phpmyadmin tables with the relationships
and descriptions, or can I embed it in my DDL? ok thx. |
| 2005/12/13-15 [Computer/SW/Database, Politics/Foreign] UID:40985 Activity:nil |
12/13 MySQL PHP admin generates the entity relationship diagram as
PDF. How does it know what the foreign keys are, and where
can I find that out? The export of DDL doesn't seem to show
foreign keys of this database that I'm trying to understand
but the ER diagram shows them.
\_ IIRC you need to tell it about the linkages (phpmyadmin) and it
stores them in a metainfo table.
\_ SHOW TABLE STATUS has fk constraints in the columns.
SHOW CREATE TABLE foo \G
shows it in a more readable format.
\_ Right, but that only works for InnoDB tables that actually
support foreign keys.
\_ I was under the mistaken impression that myisam would record
the constraint but not actually enforce the constraint. But
why are you using MyISAM?
\_ MySQL supports Foreign Keys? |
| 2005/12/7-9 [Computer/SW/Database, Computer/SW/Security, Industry/Jobs] UID:40906 Activity:nil |
12/7 We're looking for interns for a 3-5 month project helping us
populate our security policy database for various windows applications.
The work involves installing the application, using it for a while,
determining the appropriate security policy, and entering it
in to a database. Work is 15+ hours a week (however much you want
to work above min. 15 is fine), pays $12-$15 an hour, and can be
done offsite from the comfort of your own home.
email sking@zonelabs.com if you are interested.
--sky
\_ Don't you know students don't read motd?
\_ Good point. i should email jobs@csua |
| 2005/12/1-4 [Computer/SW/Database, Industry/Jobs] UID:40801 Activity:nil |
12/1 myvest is looking for a senior java developer with strong oracle
skills. if interested, email toby@myvest.com
\_ Do you sell vests?
\_ Are they made from real gorilla chests?
\_ There's no better than authentic Irish Setter. |
| 2005/11/15-17 [Computer/SW/Database] UID:40592 Activity:nil |
11/15 Ali, is it you? http://ifun.ru/picture12733.html \_ No, but this is: http://people.csail.mit.edu/rahimi/helmet |
| 2005/10/28-29 [Computer/SW/Database, Computer/SW/Languages/Java] UID:40317 Activity:low |
10/28 Has anyone interfaced Java and MySQL? Is is difficult? Where
should I start?
\_ JDBC?
\_ JDBC.
\_ JDBC, and it is really easy. |
| 2005/9/28-30 [Computer/SW/Database] UID:39919 Activity:nil |
9/28 http://sqlzoo.napier.ac.uk/cgi-bin/oliver/gisq.htm A gentle introduction to SQL, with how-to's for many different DBs \_ keywords: oracle informix sybase postgres mysql |
| 2005/9/14-15 [Computer/SW/Database] UID:39671 Activity:nil |
9/14 From the effcooperatingtechs@eff.org list:
EFF has been asked to assist in locating a testifying expert in
Oracle-based databases to assist in discussions about the
accuracy/integrity of a database used by a public entity and in
suggesting different manipulations and interpretations of the data.
The case is in Los Angeles. This is a paid position. The trial is set to
begin within a week, so the timing is very short. A last-minute expert
has been introduced by the defense and the plaintiffs are seeking an
expert to assist them in their response.
Contact allison@eff.org if you are interested and available immediately. |
| 2005/9/9-11 [Computer/SW/Database, Computer/SW/Languages/Misc] UID:39587 Activity:nil |
9/9 How do I do a SELECT STDDEV(column),MEDIAN(column) FROM table? I can
only find references to AVG. Anyone know? Thanks,
\_ http://dev.mysql.com/doc/mysql/en/group-by-functions.html
Somehow I'm just _guessing_ you're using MySQL. |
| 2005/9/2 [Computer/SW/Database, Computer/SW/OS/OsX] UID:39436 Activity:nil |
9/1 In mysql, can I share data/* (database directories) from one machine
to another? Say I'm using a Linux and a Mac, can I just copy those
files and assume they'll work? It seems to work but I'm not sure
if I'll get into trouble later. Thanks!
\_ dump the tables and scheme to a file (there are commands
for this), move file to new machine, import the data |
| 2005/9/1-2 [Computer/SW/Database] UID:39431 Activity:nil |
9/1 When I run mysql I always get 16 threads (not processes) which I'm
unable to change through .my.cnf file. How do I reduce the number
of threads? Thanks.
\_ mysql -RTFM |
| 2005/8/8-11 [Computer/SW/Database] UID:39056 Activity:nil |
8/8 I'm looking for a good log analyzer. My systems generate about a gig
a week of sendmail logs. I'd like something I can feed in the logs
in bulk and then query them through either a gui or SQL (which I can
put behind a cgi). The point is to track emails in/out of the system
so I can tell if particular emails based on from and/or to within a
date range were successfully delivered and hopefully how long it took
to deliver as well. I have a budget sufficient to purchase something
if necessary. Any suggestions? Thanks!
\_ Doesn't do everything you want, but you could check out isoqlog
--dbushong
\_ Check out Sawmill. If you want stats, munin is nice but also
doesn't do all you're looking for. -John |
| 2005/7/26-28 [Computer/SW/Database] UID:38823 Activity:nil |
7/26 Hello SQL experts, I have two tables, A and B. A has 1/2 million
rows and B has 2 million rows. The relationship is A.id=B.A_id.
Whenever I have something like:
SELECT A.id, AVG(B.val) FROM A,B WHERE A.date<'2008-01-01' AND
A.id=B.A_id GROUP BY A.id;
It takes about 20-30 seconds. Anyone know why? I've already
indexed all the ids.
\_ Do you have an index on A.date?
\_ Yes I do. I found out something new. I did a
SELECT COUNT(*) FROM ... <rest is the same here>
and I got 63 million rows. I'm guessing something
is really screwy here, do you have a clue?
How about INNER JOIN, is that faster? How do I use it?
\_ The syntax you gave is an inner join by default in most
databases. In mysql or pgsql at least, try adding "explain"
to the beginning of your select. This will tell you which
keys it's trying to use, how many rows each step gets
filtered down to, etc. --dbushong
\_ Hello I'm the op. I've reduced my problem to the following.
Say I have 4 tables, A, B, C, and D. When I do a
SELECT COUNT(*) and I join A and B, it is pretty fast.
When I join A, B, and C, it is twice as slow. And when
I join all of them, it is FOUR times as slow. I've made
sure that all the joint columns are INDEXed. Why is this
happening?
\_ You're specifying 3 join conditions, right? You have non-unique
indexes on the foreign keys and unique primary keys?
\_ Thanks Dave. Basically, column A.id is unique, column B.id
is not unique. A.id maps to B.id. Similarly, C.id is not
not unique, but also maps to B.id. Is this the reason?
I need a one to many mapping and I don't know how to get
around it.
\_ if you're using mysql, mysql can only use one index per table.
if you're joining on multiple columns, that could be your problem |
| 2005/7/22-25 [Computer/SW/Database] UID:38784 Activity:nil |
7/22 I never took a formal DB theory class, excuse me for asking SQL
questions. When I create a table, I can choose PRIMARY KEY to be
based on a single or n-tuple column. When I do that, are indices
created automatically? Second question is, if the indices are
created for n-tuple, does that mean all the column have fast
index, or they are all based on previous columns? For example, if
I do "PRIMARY KEY(col1, col2, col3)" and I do a search on just
col3, is that going to be really fast?
\_ While I don't have the SQL standard committed to memory, I suspect
that automatic creation of indices in response to primary key
specification is implementation dependent. Look in the docs for
your particular database vendor. -dans
\_ this is correct. |
| 2005/7/22-25 [Computer/SW/Database, Computer/SW/Languages/Misc] UID:38783 Activity:kinda low |
7/22 When I do SELECT AVG(col) FROM table, where col is integer, it takes
2 minutes and returns a float type. I'm suspecting part of the
problem is that it's doing floating point add? How do I make it
faster? Thanks.
\_ How many rows it is querying over?
\_ about ~2,000,000
\_ Try adding an index to col. (When in doubt, add more indexes):
ALTER TABLE table ADD INDEX (col)
\_ This won't help at all; he's doing a full table scan with no
where clause. You can test your theory by using SUM instead
of AVG; does it still take a long time? You also have to
consider that these very likely are floating point numbers
if you defined the column as NUMBER.
\_ I've seen MySQL run faster with indexes on lots of things
that really shouldn't have run any faster.
\_ Indexes may cause the db to do fewer reads, depending on
his schema.
\_ Actually I found out my problem isn't with the AVG but with
"join" process. For example, I have a lot of the followings
like SELECT ... FROM ... WHERE table1.id=table2.id2 AND
table2.id1=table3.id... I've made sure that id, id2, and
id3 are all indexed, but for 2 million rows it's still
pretty slow. I wish MySQL would tell you why things are
slow so that you can fine tune it. ARGG!! -op |
| 2005/7/22-25 [Computer/SW/Database] UID:38763 Activity:nil |
7/22 Say I have a database with two rows, one is name (VARCHAR) and the
\_ you mean cols
other one is date. Let's say the entries look like this:
joe 5-10-2005
joe 5-11-2005
mike 1-1-2002
How do I make one single SELECT statement that'll sum up all the
entries for unique names? I want it to return joe=2, mike=1
without having to write 2 separate SELECT count(*)... Thanks.
\_ select name, count(*) group by name |
| 2005/7/7-8 [Computer/SW/Database] UID:38469 Activity:nil |
7/8 Is there a good website to check the origin of a last name?
searching the web turns up lots of useless pay sites.
\_ You could put the name into the Ellis Island database:
http://www.ellisisland.org
They list the home of each listed immigrant there, so you can
get an idea of where people with that name were comming from.
\_ ask on the motd |
| 2005/5/28-31 [Computer/SW/Database] UID:37874 Activity:nil |
5/28 My .spamassassin directory takes up about 1/3 of my quota.
Roughly half of this directory is my bayes_toks file. The
other half is nearly entirely filled up by a whitelist-db
file that hasn't been modified in over a month. It's over
4Megs and seems to contain a bunch of stuff I don't even
recognize. There is also another whitelist file that is
much much smaller. What is the meaning of these files? Do
I need them? |
| 2005/5/23-25 [Computer/SW/Database, Computer/SW/OS/Windows] UID:37802 Activity:low |
5/23 There used to be a company called Arts(sp?) Digita or something like
that. Anyone knows what happened to it? Thx.
\_ Ars Digita
\_ http://www.assureconsulting.com/articles/arsdigita.shtml
\_ I like this part: "We bought a Ferrari to give away to any
employee who recruited 10 friends. In reality the car only cost
$2,000 per month, the person who won it only got to drive it for
as long as he or she was employed, and the cost of a Ferrari is
much lower than 10 headhunter commissions."
\_ commissions were what, $25k each back then? still
probably around that number today. 10*25=250k
\_ http://csua.com/?entry=23835
\_ i used to work there ... they got bought by red hat. pretty much
everyone got laid off at some pt or another except for i think
1 guy who went to red hat w/ the technology purchase (also a
berkeley grad). many of the berkeley people now work at another
berkeley consulting company that uses some of the open source
software. I dont know what happened to the boston employess. |
| 2005/5/14-17 [Computer/SW/Languages/C_Cplusplus, Computer/SW/Database] UID:37675 Activity:nil |
5/14 Jobs available in my group at Amazon
http://www.amazon.com/exec/obidos/tg/stores/jobs/pre-sales-marketplace-management/-/1/103-6511325-3219840
Interested? Send me your resume -larryl
\_ Leisure Larry?
\_ No location? |
| 2005/4/24-26 [Computer/SW/Database, Computer/SW/Apps/Media] UID:37336 Activity:low |
4/24 What's the easiest free way to convert from DIVX to avi or mpg?
Thanks
\_ DIVX (all caps) as in the failed Circuit City, DRM'd DVD offshoot?
Or DivX as in the MPEG4 variant? Isn't the .divx format basically
a renamed .avi container?
\_ yea suppose so. I just want to be able to play without any
codecs. Just used http://www.avi2divx.com successfully.
\_ Also have a look at http://www.videohelp.com --very very
good and complete page. -John
\_ If you don't want people to install codecs, then you're
pretty much stuck with MPEG1. Just use any
DirectShow-capable MPEG1 encoder (e.g. TMPGEnc). Be
forewarned, though: the picture quality will be much
worse.
\_ Also, saying "avi" is almost useless. Most DiVX files are
distributed in AVI containers. There is not remotely a single
standard codec used for avi containers. Ditto MOV these days, too.
\_ Why is this? I would think it would be easier if there was
some kind of .dvx extension or something. I hate getting an
"AVI" I can't play and I can't figure out which codec it
uses.
\_ Because there are a lot of different codecs, and otherwise
you end up with a zillion different file formats and need
different file handlers for each of them. It's just as
complex (and it eats away at the file extension namespace),
and it makes it harder to write video players, since they'd
need to handle different fiel formats. The single container,
multiple codec method allows the player to query the system
to figure out which decoder it should use (possibly querying
a server and downloading an appropriate decoder
automatically). If you want to figure out which decoder
you need, just download gspot. |
| 2005/4/21-23 [Computer/SW/Database] UID:37310 Activity:nil |
4/21 How do you calculate and determine decibel? Say I have a 20db
device. Does that mean it is 20db from X distance? And what is
the X constant? In addition, if I have TWO 20db devices running
simultaneously, clearly, it doesn't mean 40db. What is it then?
Lastly, how much does db decrease relative to distance? Is it
linear? quadratic?
\_ 0 dB is the threshold of human hearing (humans with good ears).
http://en.wikipedia.org/wiki/Decibel
You determine dB by buying a meter and viewing the digital readout.
Once you have a handle on the wikipedia link, then view:
http://www.kodachrome.org/salt/sunderst.htm
\_ If you have 2 sources that have 20dB noise individually, then you
have 2x, or about +3dB power, giving 23dB. Neglecting the damping
effects of air and any echo effects, moving twice as far away from
a point sound source gives 4x less power, or -6dB. If you're moving
away from a line sound source, such as a long narrow air vent, then
if you're 2x as far away you are also exposed to 2x as much sound
producer, so it would be -6dB+3dB=-3dB quieter.
\_ If you have ten 20dB devices, they become 30dB. If you have one
hundred 20dB devices, they become 40dB. A decibel is 10 times
log-base-10 of something. (A bel is log-base-10, and a decibel is
one-tenth of a bel.) So if you have two 20dB devices, they will be
10 * log((10 ^ (20/10)) * 2) = 23.01dB. Or think of it another way,
20dB + 10 * log(2) = 23.01dB. |
| 2005/4/13-15 [Computer/SW/Database] UID:37176 Activity:nil |
4/13 Question for the sql gods: problem: There is an output of a
rather complicated piece of sql that that lists grpid as one of the
columns. People prefer to see the GroupName which exists in another
table along with grpid. The original command involves a count
and a group by which means that adding a where will not work
since it will change the results. Looking thru the sql
cookbook yielded nothing useful --newbie sql qa guy
\_ Subselect?
\_ Join the table with the GroupName and add GroupName to the group by
clause. |
| 2005/4/8-10 [Computer/SW/Database] UID:37118 Activity:moderate |
4/8 Anyone reccomend a good mysql programming tutorial that goes
beyond the basic select statements ? I would like to be able
to do a distinct on specific column and then do a count of all
the rows that have the corresponding values. thanks --ramberg
\_ select t.col, count(*) from tble t group by t.col;
\_ thanks. --ramberg
\_ MySQL by Paul DuBois (I have the 1st edition).
\_ Is it the Paul duBois that once worked at Geoworks?
\_ no, our pld is different. -tom
\_ My main memory of pld is of him napping on keyboards
\_ I don't know. I knew a Paul Canavese at Geoworks, but not
Paul DuBois.
\- It may be the same Paul DuBois who wrote the ORA
csh/tcsh book. --psb
\_ Are you the Partha Banerjee in the ORA csh/tcsh book?
\_ You might want to check out O'Reilly's SQL in a Nutshell book.
It's not MySQL specific, but it manages to cover SQL extensively,
and documents how the dialects vary for MySQL, Postgres, Oracale,
and several others. -dans
\_ I checked out the Mysql book via orielly's safari. I
did not see mentioned anything in the way of looping
variables or being able to programmtically specify tables
e.g. database a has a table column that gives you the table
name. Is there a way to search through all of the tables in a
db or is this something people normally program ? I am trying
to figure what I can do on the mysql command line and what I
need to go into perl dbi/dbd to do.
\_ [nb Formatting fixed] So what you're talking about is table
metadata. I know mysql has commands like describe table you
can use to see the schema for a table, look through the
mysql docs on mysql. They're really well written, thorough,
and up to date. I suspect you can get at the table metadata
via the DBI, but don't know how as I have not written
anything where I needed to do so. I'm curious though, what
kind of app are you writing where you don't know database
schema at development time? Frequently querying table
metadata in your program logic seems like an odd way of
doing things to me (I may be wrong here, I'm certainly no
database guru. -dans
8 Harvesting Illegals
http://www.frontpagemag.com/Articles/ReadArticle.asp?ID=17649 |
| 2005/4/7-8 [Computer/SW/Database] UID:37111 Activity:moderate |
4/7 Does postgreSQL or mysql have anything like Oracle Advanced
Security?
\_ obUsePostGresInsteadOfMySQL
\_ What is OAS?
\_ err, OAS doesn't seem like a database product to me so much as a
suite of network security applications. So... doubt it. |
| 2005/4/1 [Computer/SW/Database] UID:37027 Activity:nil |
4/1 Yet another April fools post that pissed some people off
http://www.sswug.org/columnists/editorial.asp?id=623 |
| 2005/3/30-31 [Computer/SW/Database, Computer/SW/Languages] UID:36981 Activity:very high |
3/30 Is there a school that has an uglier website than Cal?
http://www.berkeley.edu
\_ There are plenty of schools with ugly websites. Generally,
one of two things causes a bad university web site:
1) The process gets taken over by people who are only familiar
with print publications, and they think the web site is like
a print publication.
2) The process gets taken over by bad corporate web designers who
think Flash is great.
Berkeley's situation is #1. -tom
\_ http://www.stanford.edu
\_ <DEAD>stanford.edu<DEAD> doesn't work.
\_ http://www.florida.edu
\_ http://www.texastech.edu
\_ I would argue we have a worse website than Stanford.
\_ Ya get what ya pay for.
\_ Why do you all hate cal so much? Why didn't you just
work harder to get into a better school back when you
had a choice? Regardless, why don't you share with us
an attractive university website? Or do you only know
how to mock?
\_ I (and I imagine others) DID get into "better" schools.
We/our parents couldn't afford them.
\_ Then be bitter at yourself, for not being able to
work while in school. You have no right to be such
whiny bitter bitches if you attend(ed) Cal.
\_ Wow, you need to loosen up and get the stick
out of your ass. It's pretty common for
students and alumni to mock their own school.
It's part and parcel to having a sarcastic
sense of humor that exists in decent
institutions of higher learning such as Cal.
Anyway, Cal's fine. I doubt you can get a
much better education somewhere else. In
terms of price/education ratio it's the
best deal on the market.
\_ No, I agree with you about the humor and
all. It's only that the anti-Cal sentiments
on this motd are pretty strong and frequent
so I just wanted to comment. Sure I don't
think Cal was perfect, but I still do believe
it is an outstanding university.
\_ How do you measure the quality of education
a school provides? As someone in the business
of hiring the product of schools, I tend to
measure the quality of a school by the quality
of the graduates (which is of course unfair,
since I do not take into account the quality
of the incoming students, but just the
graduates). However, just measuring by the
the quality of the graduates, Cal is far from
the head of the pack.
\_ You have a self-selecting sample. You
remind me of the recruiter at BofA who
said that I must be bad at math because I
had average grades in math. Nevermind
that the people with a 3.8 in math are
trying to get tenure at Princeton instead
of applying to work at BofA. Cal grads
compete very well overall.
\_ Well, I don't think I self-select in
the sense you mean. It's somewhat
unlikely that I would see nth quartile
students from other schools and (n-1)th
quartile students from Berkeley. Cal
new grads just aren't that competitive
compared to new grads from other "good"
schools (mit, the farm, caltech, or
even utaustin (just 1 interview trip
there, but I was impressed)). If it's
a sop to your school loyalty, I found
CMU students were even worse for what
I was hiring for (EE, not CS, with some
knowledge of circuits and transmission
lines).
\_ *YOU* don't self-select. The students
do. Maybe your project did not
attract the best, because it was not
interesting. Perhaps Cal students
are not strong at that one particular
field and you are over-generalizing.
I *do* know that Cal turns out an
awful lot of graduate students who
do top notch work, as well as the
standard doctors/lawyers/businessmen.
At my work, I don't come across a lot
of good Cal grads either, but that's
because I am in aerospace and Cal
has no department. Schools like
Purdue, UT, and MIT dominate there.
What it says about the average Cal
student is absolutely nothing.
\_ So you're claiming that some
difference in Cal students cause
them to be somehow uniquely less
interested in the companies I'm
hiring for. I find this claim
incredible. Perhaps you would
explain what is so different with
Cal grads (vs. MIT, Caltech,
'fraud, UTAustin etc.)? I've
already specified what I look for
in new grads (EE, some circuits
and transmission line). Could
any EE program that doesn't cover
some circuits and transmission
line be considered a "good"
program?
\_ Completely possible, for
example, if the jobs you
are hiring for are in
another state from CA. However,
what I am saying is that you
are probably not evaluating
the *best* students from *any*
of the schools. After that,
it's not given you are comparing
second quartile to second
quartile or, if you are, what
exactly that means.
\_ Of course the average MIT student
is better. Their incoming scores are
higher on average (as you state).
However, for same level of
achievement I find Cal students
better than those from, say,
Stanford. Also, I hired a guy from
Caltech as smart as all hell but who
is a terrible employee who has to
be told what to do all of the time.
He's been close to fired several
times now for incompetence. There
are other ingredients to success than
being book smart.
\_ I found Caltech grads to be
impractical (in the sense that
they spend too much time arguing
over and working on the optimal
thing rather than the good enough
thing). They are very good once
you've slapped them around enough
to break them. Small sample size
of only 2 though, so definitely
ymmv.
\_ I guess it depends what you mean by "better school".
I think Cal was a lot of work for minimal reward. By
that I mean not that the rewards are small, but that
the work was large. It would have been easier to go
to "lesser schools", learn less, and do less work.
Heck, the main appeal behind Stanford is not that it
is "better" but that you can do less and still get
a 3.2+ GPA while also having a name on your resume
that people care about (and fewer alums from that
school in the workforce because of the size).
However, you pay $100K+ for that honor. |
| 2005/3/26-30 [Computer/SW/Database, Computer/SW/Languages/Java] UID:36897 Activity:nil |
3/26 FBI to scratch their Virtual Case File after squandering millions of
dollars. So here is my question. How is it implemented? Is it using
Java/J2EE/Sybase or C or something else?
http://www.foxnews.com/story/0,2933,151421,00.html
\_ They probably followed these guidelines:
http://mindprod.com/unmain.html
\_ according to infoworld, it was done in java, and is more or less
a standard enterprise-ish kind of app. it seems like it's lack of
good and stable requirements that killed them. |
| 2005/3/24-25 [Computer/SW/Database, Computer/SW/Languages/Perl] UID:36846 Activity:nil Edit_by:auto |
3/24 How do I do non-blocking read in Perl? For example, let's say I do
open(FD, "tail -f file.log |");
And I'd like to read it, but not block it. Can that be done? -ok thx
\_ Yes. You need to use fcntl to mark FD as non-blocking and then
you need to use select and sysread to read from FD.
\_ http://www.unix.org.ua/orelly/perl/advprog/ch12_03.htm
http://www.unix.org.ua/orelly/perl/cookbook/ch07_15.htm
Bottom page, very useful
Open the file with sysopen, and specify the O_NONBLOCK option:
use Fcntl;
sysopen(MODEM, "/dev/cua0", O_NONBLOCK|O_RDWR)
or die "Can't open modem: $!\n";
If you already have a filehandle, use fcntl to change the flags:
use Fcntl;
$flags = '';
fcntl(HANDLE, F_GETFL, $flags)
or die "Couldn't get flags for HANDLE : $!\n";
$flags |= O_NONBLOCK;
fcntl(HANDLE, F_SETFL, $flags)
or die "Couldn't set flags for HANDLE: $!\n";
Once a filehandle is set for non-blocking I/O, the sysread or syswrite calls tha\
t would block will instead return undef and set $! to EAGAIN:
use POSIX qw(:errno_h);
$rv = syswrite(HANDLE, $buffer, length $buffer);
if (!defined($rv) && $! == EAGAIN) {
# would block
} elsif ($rv != length $buffer) {
# incomplete write
} else {
# successfully wrote
}
$rv = sysread(HANDLE, $buffer, $BUFSIZ);
if (!defined($rv) && $! == EAGAIN) {
# would block
} else {
# successfully read $rv bytes from HANDLE
} |
| 2005/3/19-22 [Computer/SW/Database] UID:36773 Activity:nil |
3/19 I put in an application to Paul Graham's summer founders program,
but am likely to incorperate regardless of weather I get funding
or not. Anyone who needs something to do over the summer should
email me. Experience/interest in foreign language(s), linguistics,
perl, sql, javascript or statistics would be useful. --darin |
| 2005/3/10 [Computer/SW/Database] UID:36633 Activity:nil |
3/10 Reading up on MySQL, it says there are 4 String data types:
TINYTEXT, TEXT, MEDIUMTEXT, LONGTEXT. The part I don't get is
why are the character limits 255, 215, 223, 231 characters? I must not
be reading the book correctly because that makes absolutely no
sense. Why would TINYTEXT have more storage than the others? Why
even have the others if TINYTEXT is bigger?
\_ I just use char,varchar, and text |
| 2005/3/7-8 [Computer/SW/Database] UID:36569 Activity:moderate |
*/* Ilyas Insult Database:
\_ #1 Lazy Bitch
\_ #2 You're a fool,
\_ Tell us about the stars, Ilya
\_ #3 Get a life
\_ #4 Your reading comprehension sucks
\_ #5 Your sarcasm meter is broken
\_ #6 Your brain has been classified as:small
\- you must pay me 5cents.
\_ hahaha thanks I totally forgot this one
\_ I can't take credit for this one. -- ilyas
\_ Seems like a parthaism to me. |
| 2005/3/2-3 [Computer/SW/Database] UID:36497 Activity:high |
3/2 Lets say you are running a website connected to a database. The
website stores all sorts of time sensative info in the database,
like order timestamps, keeping track of various states of stuff,
etc. When we go on or off daylight savings time, doesn't that totally
mess up things that deal with spans of time? How do you deal with that?
And how do you display things to the user when they happen right around
the switch-over? How about people living in regions like Arizona or
Hawaii, who don't have daylight savings time?
\_ Your server needs to have a notion of timezone. Certainly it
should know its own, and most likely that of its users as well (if
it doesn't, the users are much more likely to be confused by
consistently wrong-timezone timestamps than by the 2-hours-a-year
DST problem). Once it does, you should store dates internally
either in a timezone-insensitive format (read the time(3) manpage,
i.e. "man 3 time"), or in a timezone-sensitive format with the
timezone stored as well (although the former is recommended).
The standard notion of timezone encodes the DST status as well.
If you store dates in GMT, GMT is completely DST-free. If you store
them in, say, Pacific, it will have timezone PST for normal time
and PDT for daylight saving time. So the date that gets displayed
as "Sun Apr 3 01:18:19 PST 2005", and is stored internally as
1112519899, is one hour earlier than the date displayed as
"Sun Apr 3 03:18:19 PDT 2005" and stored internally as 1112523499.
This is obvious when you deal with the internal representations:
1112523499-1112519899=3600. -alexf
\_ UTC
\_ I guess my related question was, what if someone changes the
the time back 1 hour ... Or on a real server would no one
do that ever.
\_ Use UTC for everything. Use NTP to keep it synchronized.
UTC only changes by one leap second every few years.
\_ Gah, fine, UTC, not GMT, I stand corrected. Nitpickers. -alexf
\_ If, for some reason, you want to know a *lot* more about
the history of UTC, GMT and precision time keeping in general,
you might enjoy reading "Splitting the Second", by Tony Jones.
\_ In practice, you don't have to worry about this. Use your database
server's native DATETIME (mysql) or TIMESTAMP (everyone else) data
type. Store the current time using SYSDATE (oracle) or NOW()
(everyone else). When you access it formatted, you'll get it
in the local time format. So you have to worry about fucking with
your clock, by not about changing time zones. |
| 2005/2/16-17 [Computer/SW/Database] UID:36190 Activity:nil |
2/15 What is a good web based ldap gateway that I can set up which
will allow my HR people to populate at least the initial entry
in my ldap db (and send a mail to sysadmin) for new hires. |
| 2005/2/7-8 [Computer/SW/Database] UID:36088 Activity:nil |
2/7 Trying to get a Windows-based ER tool for PostgreSQL that supports
both reversed and forward engineering, any suggestions? Sybase
sales guys just won't call me back on PowerDesigner. Is there
mature modeling tool for PostgreSQL available? I will try
QDesigner, which I heard is just a repackaged product of PowerDesigner.
\_ It's not terribly advanced or mature, but you can do simple
schema to-and-from graph work with pgsql through Visio. --dbushong |
| 2005/1/8-9 [Computer/SW/Database] UID:35609 Activity:nil |
1/8 There is a card trick where you have someone select a card
from an imaginary deck and tell you what card they selected.
(Basically, they just pick any card they like) Then you
pull out a real deck of cards from your pocket and the card
they chose is either face down while the other cards are
face up, or has a big X on it. From searching the web,
I've found that you can pay $10 or $20 for a trick deck
that allows you to do this trick, but I still haven't the
foggiest idea how it works. Does anyone know?
\_ Large pants and 52 decks of cards!
\_ That trick only works on the weak-minded. Your Jedi
mind tricks won't work on ME. |
| 2005/1/6-8 [Computer/SW/Database, Computer/SW/OS/OsX] UID:35570 Activity:moderate |
1/6 A relative is opening a small (family) store and asks me what
software can be used to keep track of everything, like inventory,
sales, suppliers, statistics etc. Are there good and cheap commericial
(database?) programs for this? Can she use some open source solution?
Right now she uses a Mac though that can change if necessary.
\_ While I hate it with every bit of my soul, for small business,
Peachtree Accounting will do everything you've asked for. It only
runs on Windows, though.
\_ Why do you hate it?
\_ Why do you hate America?
\_ Once you grow and have multiple computers connecting to the
database, things get less stable. It uses its own form
of lock that breaks if you try to host the file on Samba
server(don't even think of trying this.) Too many maintenance
operations require the database be in single user mode.
Basically, it's fine and dandy for a small business that
intends to stay small. It's the growing pains that I don't
like.
\_ Thanks for the info. What would you have used instead?
Even very small business may want to have multiple user
access.
\_ why not quickbooks? a small biz is still a lot of work,
and getting someone to balance the books every now and
then would be easier to find since qb is the standard. |
| 2004/12/14-15 [Computer/SW/Database, Computer/SW/Graphics] UID:35283 Activity:moderate |
12/13 Video codec question. I used to be able to use my VideoWave
program to convert AVI to MPG-1 (for VCD). However after
trying a few video sharewares and uninstalling them, I can
no longer convert AVI to MPG-1 using VideoWave (it keeps on
crashing). What is going on and how would you fix it? ok thx
\_ I'd fix it by using TMPGEnc (free) instead. --jameslin
\_ just tried it, but it doesn't wanna load *.avi files :(
\_ Can you even load these AVI files in WMP? Sounds like you've
hosed your system.
\_ yes no problem. TMPGEnc asks for TWO files, audio and video.
But I only have 1 file, the AVI file. Now what? -op
\_ It asks for a video source and audio source. If they
happen to be from the same file, you just select the
same file for both. |
| 2004/12/13-14 [Computer/SW/Database] UID:35272 Activity:high |
12/13 Any PeopleSoft/Oracle insiders care to comment on what's going to
happen next? -bored procrastinator
\_ you're fired!
\_ someone please give me a 411 on what this whole thing is about?
I don't know anything about Oracle/PeopleSoft, but I'd like to
learn more about it. Does it have something to do with anti-trust
law or something?
\_ Oracle: Biggest database company, with smaller CRM software
business, headed by egotistical fucktard. After raising their
offer 4 times and launching a legal challenge to Peoplesoft's
(questionable) tactics to fight the takeover, has bought
Peoplesoft, which is arguably the leading CRM software vendor.
Previously they stated they wanted to move all Peoplesoft
customers over to Oracle databases. Peoplesoft's now-fired CEO
said more-or-less: "If it's as if someone offered you a million
bucks to buy your beloved pet dog so they could shoot it."
Many layoffs at Peoplesoft are expected, but not until they help
with the changeover. -works for neither
\_ Said egotistical fucktard replied with something like "If
Conway (ex-CEO) and his dog were standing next to each other
and I only had one bullet, trust me, it wouldn't be for
the dog." Say what you will about Larry Ellison, he does
produce good sound bytes.
\_ yoyo, word man!
\_ I think read somewhere ellison vowed to convert every peoplesoft
customer to using oracle, then firing every single
peoplesoft employee. - danh
\_ Have you been hanging around too many fobs, dan? |
| 2004/11/20-21 [Computer/SW/Database] UID:34999 Activity:high |
11/19 Sometimes I am thinking that three years from now we'll STILL
be reading about Oracle's repeated PeopleSoft takekeover attempts.
\_ isn't it wonderful how ellison has vowed to fire every
peoplesoft employee.
\_ Really? That seems like a stupid way to take over a
company.
\_ isn't increasing shareholder value wonderful.
\_ It is when you're a shareholder.
\_ Besides, this takeover is also extremely unpopular among
peoplesoft customers (at least those who run it on non-Oracle DB)
I think it is clear to every idiot that Oracle's intention is
to eliminate peoplesoft as a competitor and then make peoplesoft
users to switch to using Oracle's DB.
\_ Didn't that Tim Curry impersonator jackass say as much?
\_ as a PeopleSoft customer, I think destroying the company
sounds like a great idea. |
| 11/23 |