Обсуждение: Some additions to pg_filedump...
I did a bit of hacking on pg_filedump to make it slightly more useful...but it wasn't clear where or to whom the patches should be sent, so I'm sending an email to pgsql-admins 'cause they're the kind of folks that probably care about them... The changes I added are two command line options: -F <filter> to filter out which items get dumped. presently only works on the infomask field. -T <types> to dump out each item according to either int,char,varchar,bool types (yes, I know, that's not all of the postgres types.) -q to supress lots of additional output (quiet) Now, combined they allow data to be recovered from a situation where the index is fubar'd but you've still got good data and you don't want to recover from backup...that said, there is great danger because pg_filedump doesn't know which item from the dataset is the most recent/alive one. If there's further interest, I can add more types but the warning above holds. pg_filedump shouldn't be used for what the above makes easy but I can't see why that shouldn't be a decision we (and not the db) gets to make... Cheers, Darren http://coombs.anu.edu.au/~avalon/pg_fd_FT.patch.gz
Hi, On Mon, 2008-04-21 at 13:51 +0200, Darren Reed wrote: > I did a bit of hacking on pg_filedump to make it slightly more > useful...but it wasn't clear where or to whom the patches should > be sent, pg_filedump is maintained by Red Hat: http://sources.redhat.com/rhdb/ Current maintainer is Tom, and I CC'ed him, to make sure that he does not miss this e-mail. Regards, -- Devrim GÜNDÜZ , RHCE PostgreSQL Replication, Consulting, Custom Development, 24x7 support Managed Services, Shared and Dedicated Hosting Co-Authors: plPHP, ODBCng - http://www.commandprompt.com/
Вложения
On Mon, 21 Apr 2008 23:19:48 +0300, "Devrim GÜNDÜZ" <devrim@CommandPrompt.com> said: > Hi, > > On Mon, 2008-04-21 at 13:51 +0200, Darren Reed wrote: > > I did a bit of hacking on pg_filedump to make it slightly more > > useful...but it wasn't clear where or to whom the patches should > > be sent, > > pg_filedump is maintained by Red Hat: > > http://sources.redhat.com/rhdb/ > > Current maintainer is Tom, and I CC'ed him, to make sure that he does > not miss this e-mail. I saw this, but when I went in search of activity, there was nothing. Look in: http://sources.redhat.com/ml/rhdb/ http://sources.redhat.com/ml/rhdb-announce/ http://sources.redhat.com/ml/rhdb-cvs/ All of the archives for 2008 are empty... It looks like "PostgreSQL - Red Hat Edition Project" is a defunct project. Darren
Darren Reed wrote: > I saw this, but when I went in search of activity, there was nothing. > > Look in: > http://sources.redhat.com/ml/rhdb/ > http://sources.redhat.com/ml/rhdb-announce/ > http://sources.redhat.com/ml/rhdb-cvs/ > > All of the archives for 2008 are empty... > > It looks like "PostgreSQL - Red Hat Edition Project" is a defunct > project. Perhaps it would be apropos for RedHat to donate pg_filedump under BSD license so we could include it in contrib? It's not like they're getting much benefit of it being under GPL. -- Alvaro Herrera http://www.CommandPrompt.com/ The PostgreSQL Company - Command Prompt, Inc.
Hi, On Wed, 2008-04-23 at 11:55 +0200, Darren Reed wrote: > I saw this, but when I went in search of activity, there was nothing. See ChangeLog: 2008-02-08 Tom Lane <tgl@redhat.com> --- Regards, -- Devrim GÜNDÜZ , RHCE PostgreSQL Replication, Consulting, Custom Development, 24x7 support Managed Services, Shared and Dedicated Hosting Co-Authors: plPHP, ODBCng - http://www.commandprompt.com/
Вложения
On Wed, 23 Apr 2008 09:20:49 -0400, "Alvaro Herrera" <alvherre@CommandPrompt.com> said: > Darren Reed wrote: > > > I saw this, but when I went in search of activity, there was nothing. > > > > Look in: > > http://sources.redhat.com/ml/rhdb/ > > http://sources.redhat.com/ml/rhdb-announce/ > > http://sources.redhat.com/ml/rhdb-cvs/ > > > > All of the archives for 2008 are empty... > > > > It looks like "PostgreSQL - Red Hat Edition Project" is a defunct > > project. > > Perhaps it would be apropos for RedHat to donate pg_filedump under BSD > license so we could include it in contrib? It's not like they're > getting much benefit of it being under GPL. If there's interest, why not just write a new version of said program from scratch so that it can be included in contrib? And yes, if others are strapped for time, I'm willing to look into doing this more, soon, now that I realise that GPL is a problem for wider use. Darren
Alvaro Herrera wrote: > Darren Reed wrote: > > >> I saw this, but when I went in search of activity, there was nothing. >> >> Look in: >> http://sources.redhat.com/ml/rhdb/ >> http://sources.redhat.com/ml/rhdb-announce/ >> http://sources.redhat.com/ml/rhdb-cvs/ >> >> All of the archives for 2008 are empty... >> >> It looks like "PostgreSQL - Red Hat Edition Project" is a defunct >> project. >> > > Perhaps it would be apropos for RedHat to donate pg_filedump under BSD > license so we could include it in contrib? It's not like they're > getting much benefit of it being under GPL. > Whether or not that was a hint, I sat down and wrote a program from scratch to try and dump out only the data files. I suppose this might be a version 1.0. http://coombs.anu.edu.au/~avalon/pg_dumpdata.tgz Alas, there is a catch... I couldn't work out the binary format for all of the data types - as an exercise I tried to reverse engineer their behaviour from examining what got stored and for most of the simple types, I think I've got it right. I couldn't fathom "time"; the geometric ones I couldn't easily find examples of how to insert data - I am assuming the web documentation is self explanatory to those who use it; "double" wasn't a straight fit of "double' from unix (huh?) and "bit" wants a length to work which was against what I was trying to achieve. It might be interesting to write something that tries to deconstruct the index files, but to me there's no value in that - the value is in the data. Cheers, Darren