NAME
rq v2.3.3
SYNOPSIS
rq (queue | export RQ_Q=q) mode [mode_args]* [options]*
URIS
http://codeforpeople.com/lib/ruby/rq/
http://raa.ruby-lang.org/project/rq/
http://www.linuxjournal.com/article/7922
DESCRIPTION
ruby queue (rq) is a zero-admin zero-configuration tool used to cre
NAME
rq v2.3.2
SYNOPSIS
rq (queue | export RQ_Q=q) mode [mode_args]* [options]*
URIS
http://raa.ruby-lang.org/project/rq/
http://codeforpeople.com/lib/ruby/rq/rq-2.3.2/README
http://www.linuxjournal.com/article/7922
DESCRIPTION
ruby queue (rq) is a zero-admin zero-configuration to
On Tue, 17 May 2005, Jaap Krabbendam wrote:
I have been simulating a crash during a transaction. After BEGIN, at some
point I do exit(-1) instead of COMMIT or ROLLBACK in order to simulate a
crash.
After that, I can see that a -journal file is present. If I restart my
executable, it seems that the
On Mon, 9 May 2005, Helmut Tschemernjak wrote:
Hello,
sqlite3 3.2.1 gives SQLITE_LOCKED errors if one process updates the database
and another accesses it. Most retries will fail if the other processes is
working e.g. many inserts.
Here is my idea:
Keep a list of up to 32 pid_t of waiting processes
On Tue, 3 May 2005, Tom Shaw wrote:
At 6:09 PM -0400 5/3/05, D. Richard Hipp wrote:
On Tue, 2005-05-03 at 17:45 -0400, Tom Shaw wrote:
Hi.
I was using SQLite with PHP 5 (MacOSX) and due to some issues the php
page timedout before completing the DB update. Now I can't read the
DB via php nor via
On Sun, 1 May 2005, D. Richard Hipp wrote:
On Sun, 2005-05-01 at 00:28 +0800, Damian Slee wrote:
i want to make a copy of a sqlite3 database file while it is open. is
there anyway that i can tell programatically that any caches/journals
are flushed out? or is there any way to get and exclusive loc
On Thu, 28 Apr 2005 [EMAIL PROTECTED] wrote:
Try
"select * from sqlite-master";
Regards,
look good... that combined with 'pragma table_info'...
this is o.k. for 2.8.x AND 3.x.x ??
cheers.
-a
--
===
| email :: ara [dot]
is there a query that can be run against 2.8.x and 3.x dbs that will return
something like
tablename | fieldname | fieldname | fieldname
for example given
create table foo (
a,
b
);
create table bar (
x,
y,
z
);
this should return
foo|a|b|NULL
bar|x|y|z
another alt
On Fri, 18 Mar 2005, Eli Burke wrote:
How about using a second in-memory database for your modifications, then
using ATTACH to merge the changes. I'm fairly sure I remember Dr. Hipp
stating that moving complete rows between attached database tables is very
speedy. Depending on the particulars of yo
On Fri, 18 Mar 2005, Andrew Piskorski wrote:
If besides that one slow update you had ONLY READS (and those reads do not
care which version of the data they get, old or new), I'd say sure, fine, an
atomic "swap in a totally new db" operation might be worth trying.
But for a database with active read
On Fri, 18 Mar 2005, Lothar [unknown-8bit] Märkle wrote:
sqlite3_exec(db, "BEGIN EXCLUSIVE TRANSACTION", NULL, NULL, error);
copyFiles();
sqlite3_exec(db, "COMMIT", NULL, NULL, error);
i think you have to use sqlite3_close to be shure all
data is written. then copy.
Also are you sure it is complete
On Sat, 12 Mar 2005, Andrew Piskorski wrote:
On Sat, Mar 12, 2005 at 10:03:25AM -0700, Ara.T.Howard wrote:
does anyone have a strategy for doing massive updates to a db and atomicly
replacing it in a multi-process situation?
Why would you want to do that? SQLite properly supports transactions, so
does anyone have a strategy for doing massive updates to a db and atomicly
replacing it in a multi-process situation?
cheers.
-a
--
===
| EMAIL :: Ara [dot] T [dot] Howard [at] noaa [dot] gov
| PHONE :: 303.497.6469
|
On Tue, 4 Jan 2005, Steve Milner wrote:
Hello List,
I am having a problem with SQLite erroring out on Mac OS X. I am using 3.0.8.
The problem happens when it tries to access a SAMBA/CIFS shared database. In
my testing Windows to Linux and Linux to Windows worked fine, but Mac to
Windows fails wi
On Wed, 15 Dec 2004, Christopher Petrilli wrote:
One thing I've noticed is that if I turn of synchronous, the
filesystem slowly slows down, which is fun, but it doesn't do so
enough that it's a major issue.
I'm using the APSW wrapper for Python, which is basically a very thin
wrapper over the basic
On Tue, 14 Dec 2004, Christopher Petrilli wrote:
On Tue, 14 Dec 2004 12:03:01 -0700 (MST), Ara.T.Howard
<[EMAIL PROTECTED]> wrote:
On Tue, 14 Dec 2004, Christopher Petrilli wrote:
Has anyone had any experience in storing a million or more rows in a
SQLite3 database? I've got a databas
On Tue, 14 Dec 2004, Christopher Petrilli wrote:
Has anyone had any experience in storing a million or more rows in a
SQLite3 database? I've got a database that I've been building, which
gets 250 inserts/second, roughly, and which has about 3M rows in it.
At that point, the CPU load is huge.
Note
On Wed, 8 Dec 2004, D. Richard Hipp wrote:
Ara.T.Howard wrote:
Has anyone seen anything like this and can suggest possible causes?
does your code fork?
Ooo. That sounds like the voice of experience speaking. :-)
I should add forking to the documented list of ways to corrupt
your database file.
i
On Wed, 8 Dec 2004, Michael Robinette wrote:
I have table somewhat like this created by sqlite 2.8.14:
create table t1( created timestamp not null, n int not null, url text
not null, primary key(n) );
somehow i've ended up with a database where .dump t1 produces a bunch of
insert into t1 values(NUL
On Wed, 1 Dec 2004, D. Richard Hipp wrote:
I have lately noticed a need for an "IS" operator in SQLite.
IS would work just like "=" for most things. The difference
is that "IS" would compares NULLs as equals. There would,
of course, need to be a corresponding "IS NOT" operator.
You can already us
every month or so someone seems to write in with 'database locked'
questions.
is there any good reason a pragma could not be added to
lock the file in a blocking fashion (pragma locks_block)
lock the whole file vs. byte range locking (pragma allbytes)
??
i realize this yields lower performance
On Wed, 1 Dec 2004, Brass Tilde wrote:
i've read the 'null handling' section and still not found the answer to
this
question:
why should
'select * from tbl where field=null'
be any different from
'select * from tbl where field isnull'
The short answer is "because it's different".
A
On Wed, 1 Dec 2004, Alexander Jordanov wrote:
this is getting a bit of off thread so if anyone is annoyed please speak up.
I can't really make that because in PHP i can't set a global variable that
will be available for anyone that uses the script. If i set a variable and
change it in the script th
i've read the 'null handling' section and still not found the answer to this
question:
why should
'select * from tbl where field=null'
be any different from
'select * from tbl where field isnull'
using 2.8.15 it seems to be:
jib:~ > sqlite db 'create table tbl(field); insert into tbl
On Tue, 30 Nov 2004, Alexander Jordanov wrote:
I am 100% sure that my all my queries go trought that class. Unfortunatelly
it is too late to make such changes ('forces the user to specify whether the
transaction is write or read') - i have too many scripts to change.
make every single sql executio
On Wed, 24 Nov 2004, Alexander Jordanov wrote:
@Ara.T.Howard:
Thanks for the suggestion i will try it and hope the database will not
lock again...
Here is what i did:
clearstatcache ();
if ($sql[0]=='S'){
$fp=fopen('ko
On Tue, 23 Nov 2004, Alexander Jordanov wrote:
Hi i have an SQLite database file that gets locked from time to time and
some parts of the site that uses the sqlite cannot be accesed. For what i
know the SQLite database uses the OS locking mechanism. So my question is:
Is there any way to unlock it
On Fri, 5 Nov 2004, Jeff Flowers wrote:
Is anyone using SQLite to manange personal data; not as part of another
program but by itself, as distributed with the sqlite frontend? I searched
Google but no one seems to be talking about SQLite as a program by itself.
i do. anytime i have to manage data
On Mon, 4 Oct 2004, D. Richard Hipp wrote:
but still, there are no blocking locks correct? and, by extension, beginning
a transaction could still result in busy being returned correct?
regards.
-a
--
===
| EMAIL :: Ara
On Wed, 29 Sep 2004, Max wrote:
You need to link against the SQLite library:
$ gcc pippo.c -o pippo -lsqlite
Nothing the result is the same ..
you need to link against the sqlite version 3 library (you've probably
succesfully linked against a version 2 library on your system).
try something like
On Wed, 29 Sep 2004, Federico Granata wrote:
Hi I'm looking for a sqlite 3.0.7 wrapper for ruby (nothin found with wiki).
sqlite 2.x series is at http://sqlite-ruby.rubyforge.org/
i think 3.x is in the work by jamis buck, if not i'll proably attack in a
month or so.
-a
--
==
On Fri, 24 Sep 2004, Eddy Macnaghten wrote:
An attraction of SQLite is that it is all client based - making almost
practically zero cost administration. Although this is not an issue on
implementations that have an IT department, it makes a BIG difference in
supporting the penny-ally implementatio
On Fri, 24 Sep 2004, Matt Sergeant wrote:
On 24 Sep 2004, at 17:43, Ara.T.Howard wrote:
On Fri, 24 Sep 2004, Matt Sergeant wrote:
On 24 Sep 2004, at 14:51, Ara.T.Howard wrote:
What are people's views on this?
i think it's sufficiently common to merit discussion on best practices
at
l
On Fri, 24 Sep 2004, David Fletcher wrote:
Hi all,
http://opendlm.sourceforge.net might be an interesting place to
start.
great link. thanks!
-a
--
===
| EMAIL :: Ara [dot] T [dot] Howard [at] noaa [dot] gov
| PHONE ::
On Fri, 24 Sep 2004, Matt Sergeant wrote:
On 24 Sep 2004, at 14:51, Ara.T.Howard wrote:
What are people's views on this?
i think it's sufficiently common to merit discussion on best practices at
least.
More than that, I'm thinking there might be a call for an os_nfs.c that uses
On Fri, 24 Sep 2004, Eddy Macnaghten wrote:
There is no way I can guarantee the "nfs" to be good. Also, a mixture of
Linux and Windows clients need to be allowed for, I do not know how SAMBA
supports the fcntl functionality, or how well it interfaces with the Windows
Server or Client locking mecha
On Fri, 24 Sep 2004, Eddy Macnaghten wrote:
However, reading the documentation it seems that SQLite is not hot on
concurrent access through networks, or across platforms, due to the funnies
of fcntl, or incompatibilities between Windows and Linux and so on.
it works o.k. if your nfs impl is good (n
On Wed, 22 Sep 2004, D. Richard Hipp wrote:
Ara.T.Howard wrote:
On Sat, 18 Sep 2004, Ara.T.Howard wrote:
say you have the following logic:
begin transaction in parent
if pid = fork
commit transaction
close database
else
close database
...
end
I do not know what will happen
On Sat, 18 Sep 2004, Ara.T.Howard wrote:
say you have the following logic:
begin transaction in parent
if pid = fork
commit transaction
close database
else
close database
...
end
should this be o.k.? i notice the unlink of the db-journal will happen twice
- which should be
say you have the following logic:
begin transaction in parent
if pid = fork
commit transaction
close database
else
close database
...
end
should this be o.k.? i notice the unlink of the db-journal will happen twice
- which should be o.k. but will flush/sync operat
On Thu, 16 Sep 2004 [EMAIL PROTECTED] wrote:
If this were implemented, it would remove the capability to go into the
background. A common thing for a daemon process to do upon start-up is to
get everything initialized (e.g. open databases and do other things that
could fail and would need to be re
On Fri, 3 Sep 2004, John LeSueur wrote:
a followup on this post:
i was running some straces on sqlite while it using transactions and think
i
may have found the source of the problem, we see this in in the strace
output:
...
...
close(5)= 0
unlink("/dmsp/m
On Sat, 4 Sep 2004, Ara.T.Howard wrote:
On Fri, 3 Sep 2004, John LeSueur wrote:
I think this file is created everytime you start a transaction. Maybe even
if you only perform read only commands. The journal is what is used to
keep
track of the changes to the database. Anyone else have any
On Fri, 3 Sep 2004, John LeSueur wrote:
I think this file is created everytime you start a transaction. Maybe even
if you only perform read only commands. The journal is what is used to keep
track of the changes to the database. Anyone else have any thoughts?
yes - it is. the thing is, unless a
On Fri, 3 Sep 2004, Ara.T.Howard wrote:
if you are unfamiliar with nfs sillynames, they occur when a file that is
open
on one client is removed or renamed on another.
i am seeing alot of these appear in an NFS directory i'm using to store a
sqlite database acessed by many clients. the a
if you are unfamiliar with nfs sillynames, they occur when a file that is open
on one client is removed or renamed on another.
i am seeing alot of these appear in an NFS directory i'm using to store a
sqlite database acessed by many clients. the access protocol is a
meta-transaction wrapped around
On Fri, 3 Sep 2004, Zahraie Ramin-p96152 wrote:
-Original Message-
From: John LeSueur [mailto:[EMAIL PROTECTED]
Sent: Friday, September 03, 2004 11:09 AM
To: [EMAIL PROTECTED]
Subject: Re: [sqlite] One more question on the C API performance
A 1000 rows of data return instantaneously. How
On Wed, 1 Sep 2004, Christian Smith wrote:
A transaction gives you a snapshot in time of the database. You may need to
do more than one query, and require a consistent snapshot for the duration
of the multiple queries.
this is definitely a real world need - in my latest code i have a 'snapshot'
met
On Wed, 25 Aug 2004, D. Richard Hipp wrote:
Ara.T.Howard wrote:
On Tue, 24 Aug 2004, D. Richard Hipp wrote:
The more people use SQLite version 3, the faster it will leave beta
status
in particular, which features would you say need tested? i have many uses
for sqlite, perhaps i may be able
On Tue, 24 Aug 2004, D. Richard Hipp wrote:
Mauricio Piacentini wrote:
I will update SQLiteBrowser to use version 3 when it leaves beta
status
The more people use SQLite version 3, the faster it will leave
beta status
in particular, which features would you say need tested? i have many u
On Tue, 24 Aug 2004, D. Richard Hipp wrote:
Matt Wilson wrote:
Normally python programmers would like to see named arguments in
dictionary substation format:
d = { 'blob': 'a\0b', 'id': 2 }
cursor.execute("UPDATE t1 SET value=%(bigblob)s WHERE rowid=%(id)d", d)
I'd be willing to extend the lexer/pa
On Fri, 20 Aug 2004, Elmar Haneke wrote:
ssh only. period. nothing gets in or out except
on 22.
You can forward the database-access through an SSH-tunnel.
can you do this using passphrases in a manner that works across reboots w/o
embedding passphrases? i can't figure out how to - at some point
On Fri, 20 Aug 2004, Matt Sergeant wrote:
Right, but regardless of what locking you ADD to the system, sqlite is still
going to do the lockd NFS locking itself. At least until you provide patches
to make NFS locking safe :-)
my current scheme, which may not be entirly fool proof, i first obtain a r
On Fri, 20 Aug 2004, Andrew Piskorski wrote:
On Fri, Aug 20, 2004 at 08:45:06AM -0600, Ara.T.Howard wrote:
On Fri, 20 Aug 2004, Matt Sergeant wrote:
As far as linux -> nfs access goes it all depends on the quality of
the NFS implementation, and the kernel drivers you're using. It'
On Fri, 20 Aug 2004, Matt Sergeant wrote:
As far as linux -> nfs access goes it all depends on the quality of the NFS
implementation, and the kernel drivers you're using. It's not easy to create
a stable NFS locking system. We've had lots of problems with it. If you can,
go with local disk.
i canno
has anyone out there used sqlite from a windows machine when the db resided on
an nfs filesystem mounted using the windows nfs client? if so, does it work?
have you attempted concurrent access from other windows machines? other *nix
machines?
i'm considering an application where process from both
On Wed, 4 Aug 2004, Rajesh Nagarajan wrote:
Hi
I am trying to move to memory database from file based sqlite db, I want my memory
database to be
shared across various threads in my process.
How do I do it?
From the Wiki documentation, I found the following
* (defvar db2 (sql:connect '(":memory:")
On Mon, 2 Aug 2004, Tito Ciuro wrote:
Hello Ara,
On 2 ago 2004, at 9:59, Ara.T.Howard wrote:
the simplest way to do this is to create a file for each db, say db.lock,
and to apply a blocking read/write to this file depending on the intent of
your operation. the contents of this file are not
On Mon, 2 Aug 2004, Oliver Harvey wrote:
hello all,
we have many thousands of sqlite databases reporting 'database is locked'.
then your access is occuring at a moment when another process is also using
the database in a way that prevents aquiring the correct type of lock. sqlite
uses non-blockin
somehow i've managed to corrupt my db - the error was
./src/pager.c:1179: syncJournal: Assertion `pPager->nRec*pgSz+hdrSz==jSz' failed.
running PRAGMA integrity_check yields something like
carp:~/eg/ruby/rq/rq-0.1.2 > sqlite q 'PRAGMA integrity_check' | head
*** in database main ***
On page
On Mon, 19 Jul 2004, gohaku wrote:
Hello everyone,
I am currently using SQLite v2.8.11.
I have not had much experience with SQLite other than executing simple
Queries and Updates.
I don't have any problems with SQLite v2.8.11 and as such,
have not upgraded to v3.0.2
I would like to know if v3.0.2 h
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