Further to the below e-mail, I've come across a slight problem.
The starting checkpoint location in a backup I've just taken is
"0/22A3190" (note: 7 digits after the /, not 6 as I first thought.)
However the .backup file is called <WAL_FILE>.002A3190 (ie. it only
takes the right-most 6 digits).
Can someone confirm this is the correct case?
Thanks,
Andy.
-------- Original Message --------
Subject: Checkpoint Location Format
Date: Tue, 07 Nov 2006 13:12:53 +0000
From: Andy Shellam (Mailing Lists) <andy.shellam-lists@mailnetwork.co.uk>
To: pgsql-admin@postgresql.org
Hi,
I'm writing an automated file-system level backup application for use
with WAL archiving, that will issue the pg_start_backup call, tar and
gzip the cluster data directory, issue the pg_stop_backup call, and
remove all previous un-needed WAL files from the archive.
I need to write a regular expression that will search for the WAL
filename and checkpoint location from the backup_label file, and just
want to clarify that the checkpoint location will always be of the
format: X/XXXXXX - where X is one of 0-9, A-F?
And then the WAL .backup file that is generated in the archive, has a
filename of the form:
<WAL_FILE>.00XXXXXX.backup
where <WAL_FILE> is the name of the "STARTING WAL LOCATION" directive in
the backup_label file, and XXXXXX is the last 6 digits of the checkpoint
(after the / )?
Thanks,
Andy.