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* Backup from a hot standby
@ 2010-03-04 06:47 Mikko Partio <mpartio@gmail.com>
2010-04-05 08:34 ` Re: Backup from a hot standby Fujii Masao <masao.fujii@gmail.com>
0 siblings, 1 reply; 2+ messages in thread
From: Mikko Partio @ 2010-03-04 06:47 UTC (permalink / raw)
To: pgsql-admin
Hi
I'm currently testing Pg 9.0.0 alpha 4 and the hot standby feature (with
streaming replication) is working great. I tried to take a filesystem backup
from a hot standby, but I guess that is not possible since executing "SELECT
pg_start_backup('ss')" returns an error? Or can I just tar $PGDATA and copy
the xlog files generated during the backup, since the server is in constant
recovery mode? In Oracle it is possible to take backups from a data guard
standby, which is very useful since that way making the backups does not
stress the master server.
Anyway, I must say that we are very pleased to see HS and SR features, and
we hope that 9.0.0 goes to beta (and to an official release) soon!
Regards
Mikko
^ permalink raw reply [nested|flat] 2+ messages in thread
* Re: Backup from a hot standby
2010-03-04 06:47 Backup from a hot standby Mikko Partio <mpartio@gmail.com>
@ 2010-04-05 08:34 ` Fujii Masao <masao.fujii@gmail.com>
0 siblings, 0 replies; 2+ messages in thread
From: Fujii Masao @ 2010-04-05 08:34 UTC (permalink / raw)
To: mpartio@gmail.com; +Cc: pgsql-admin
Sorry for the delay.
On Thu, Mar 4, 2010 at 3:47 PM, Mikko Partio <mpartio@gmail.com> wrote:
> Hi
> I'm currently testing Pg 9.0.0 alpha 4 and the hot standby feature (with
> streaming replication) is working great. I tried to take a filesystem backup
> from a hot standby, but I guess that is not possible since executing "SELECT
> pg_start_backup('ss')" returns an error? Or can I just tar $PGDATA and copy
> the xlog files generated during the backup, since the server is in constant
> recovery mode? In Oracle it is possible to take backups from a data guard
> standby, which is very useful since that way making the backups does not
> stress the master server.
You can take a base backup of the standby while it's in progress, without
calling pg_start_backup() and pg_stop_backup(). Please see the following
document.
http://developer.postgresql.org/pgdocs/postgres/backup-incremental-updated.html
Regards,
--
Fujii Masao
NIPPON TELEGRAPH AND TELEPHONE CORPORATION
NTT Open Source Software Center
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2010-03-04 06:47 Backup from a hot standby Mikko Partio <mpartio@gmail.com>
2010-04-05 08:34 ` Fujii Masao <masao.fujii@gmail.com>
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