Re: WAL archiving

You can have a warm standby system in place. Pls check this link - http://archives.postgresql.org/sydpug/2006-10/msg00001.php 



 

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> Date: Mon, 25 Feb 2008 09:54:34 +1030
> From: ssudhakar@internode.com.au
> To: aroravishal22@hotmail.com
> CC: pgsql-admin@postgresql.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@internode.com.au
> >> > To: pgsql-admin@postgresql.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
> >> >
> >> >
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> >
>
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