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Re: WAL archiving

From: Shilpa Sudhakar <ssudhakar(at)internode(dot)com(dot)au>
To: Vishal Arora <aroravishal22(at)hotmail(dot)com>
Cc: pgsql-admin(at)postgresql(dot)org
Subject: Re: WAL archiving
Date: 2008-02-25 05:01:23
Message-ID: 47C24BA3.90609@internode.com.au (view raw or flat)
Thread:
Lists: pgsql-admin
Thanks for the link Vishal

Regards,
Shilpa



Vishal Arora wrote:
>
> You can have a warm standby system in place. Pls check this link - 
> http://archives.postgresql.org/sydpug/2006-10/msg00001.php 
>
>
>
>  
> ------------------------------------------------------------------------
>
> > Date: Mon, 25 Feb 2008 09:54:34 +1030
> > From: ssudhakar(at)internode(dot)com(dot)au
> > To: aroravishal22(at)hotmail(dot)com
> > CC: pgsql-admin(at)postgresql(dot)org
> > Subject: Re: [ADMIN] WAL archiving
> >
> > Shilpa Sudhakar wrote:
> > > Hi Vishal,
> > >
> > > Below is the setup in the postgresql.conf file
> > >
> > > fsync = true # turns forced synchronization on or off
> > > wal_sync_method = fsync # the default varies across platforms:
> > > #wal_buffers = 8 # min 4, 8KB each
> > > #commit_delay = 0 # range 0-100000, in microseconds
> > > #commit_siblings = 5 # range 1-1000
> > >
> > > # - Checkpoints -
> > >
> > > checkpoint_segments = 3 # in logfile segments, min 1, 16MB each
> > > checkpoint_timeout = 300 # range 30-3600, in seconds
> > > checkpoint_warning = 30 # 0 is off, in seconds
> > >
> > > # - Archiving -
> > >
> > > archive_command = 'cp -i %p /usr/local/var/pgsql/data/wal_log/%f'
> > > # command to use to archive a logfile segment
> > >
> > > Since this is the test system i've put the wal_log folder in the data
> > > folder itself. But, later on i'll be moving this to a different disk.
> > >
> > > We have thousands and thousands of records that get inserted and
> > > updated so the wal logs would be increasing in a large rate. I was
> > > thinking if i want to delete the wal logs after a period of time, 
> do i
> > > take a base backup again and then delete those old files?
> > >
> > > Thanks and Regards,
> > > Shilpa
> > >
> > >
> > > Vishal Arora wrote:
> > >>
> > >> Hi Shilpa,
> > >>
> > >> You need not take base backup again and again. You have WAL
> > >> Archiveing in place, that is enough to restore the database. BTW,
> > >> what archiving command are you using for WAL Archiving in you
> > >> postgresql.conf.
> > >>
> > >> - Vishal
> > >>
> > >> 
> ------------------------------------------------------------------------
> > >>
> > >> > Date: Fri, 22 Feb 2008 09:53:25 +1030
> > >> > From: ssudhakar(at)internode(dot)com(dot)au
> > >> > To: pgsql-admin(at)postgresql(dot)org
> > >> > Subject: [ADMIN] WAL archiving
> > >> >
> > >> > Hi All,
> > >> >
> > >> > I am new to postgres and have been slowly learning the concepts.
> > >> >
> > >> > Regarding WAL archiving, we first take a base backup and then 
> save all
> > >> > the wal logs for PITR.
> > >> >
> > >> > Both the base backup and wal logs are stored in another disk.
> > >> >
> > >> > Since the wal logs keep increasing, do we take the base backup
> > >> every now
> > >> > and then so that we can delete the old log files?
> > >> > How often do we take a base filesystem backup keeping in mind 
> that our
> > >> > systems are 24 x 7.
> > >> >
> > >> > Any suggestions are appreciated.
> > >> >
> > >> > Thanks and Regards,
> > >> > Shilpa
> > >> >
> > >> >
> > >> > ---------------------------(end of
> > >> broadcast)---------------------------
> > >> > TIP 9: In versions below 8.0, the planner will ignore your 
> desire to
> > >> > choose an index scan if your joining column's datatypes do not
> > >> > match
> > >>
> > >>
> > >> 
> ------------------------------------------------------------------------
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> > >
> >
> >
> > ---------------------------(end of broadcast)---------------------------
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> >
> > http://www.postgresql.org/about/donate
>
>
> ------------------------------------------------------------------------
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