Re: WAL archiving

On 2/22/08, Shilpa Sudhakar <ssudhakar(at)internode(dot)com(dot)au> wrote:
>
> 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.

Not exactly.
1. adjust acrhive_command to save wal's to backup dir
2. execute SELECT pg_start_backup('lable')
3. copy database files
4. execute SELECT pg_stop_backup()

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?

Yes, but do not delete old files until the new backup was successfully
finished.

How often do we take a base filesystem backup keeping in mind that our
> systems are 24 x 7.

It depends on your diskspace & load.

Any suggestions are appreciated.

Read the manual. It's pretty good & explains almost everything.

--
Vladimir Rusinov
Voronezh, Russia
UNIX Admin @ Murano Software