Thread: Insuring consistant backups

Hi:

A question regarding backups.  Commercial databases I've administered have had
some facility to freeze or redirect transactions when a backup is being taken
from a database which is online, in order to insure that the backup snapshots a
consistant database.

Does postgresql have a similar facility, or do I have to script some solution,
perhaps forcing all sessions to be dropped before doing a pg_dump ?

Thanks,
-- Pat


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pg_dump does a snapshot at backup start, so your backups will be
consistent even if there is activity.

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spinler@kmtel.com wrote:
>
>
> Hi:
>
> A question regarding backups.  Commercial databases I've administered have had
> some facility to freeze or redirect transactions when a backup is being taken
> from a database which is online, in order to insure that the backup snapshots a
> consistant database.
>
> Does postgresql have a similar facility, or do I have to script some solution,
> perhaps forcing all sessions to be dropped before doing a pg_dump ?
>
> Thanks,
> -- Pat
>
>
> -------------------------------------------------
> This mail sent through IMP: http://horde.org/imp/
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 4: Don't 'kill -9' the postmaster
>

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073

On 9 Dec 2002 at 21:33, spinler@kmtel.com wrote:

> Does postgresql have a similar facility, or do I have to script some
> solution, perhaps forcing all sessions to be dropped before doing a
> pg_dump ?

From man pg_dump and http://www.postgresql.org/idocs/index.php?app-
pgdump.html:

pg_dump makes consistent backups even if the database is being used
concurrently.


--
Dan Langille : http://www.langille.org/