From: | Ian Lea <ian(dot)lea(at)gmail(dot)com> |
---|---|
To: | Gnanam <gnanam(at)zoniac(dot)com> |
Cc: | pgsql-admin(at)postgresql(dot)org |
Subject: | Re: PITR archive_timeout Command |
Date: | 2009-08-03 11:17:12 |
Message-ID: | 8c4e68610908030417g653dfb5bn34bbda4c9e8e54f0@mail.gmail.com |
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Thread: | |
Lists: | pgsql-admin |
1) Exactly the database was at 10:15 am
>From http://www.postgresql.org/docs/8.3/static/continuous-archiving.html
"There is nothing that says we have to replay the WAL entries all the
way to the end. We could stop the replay at any point and have a
consistent snapshot of the database as it was at that time. Thus, this
technique supports point-in-time recovery: it is possible to restore
the database to its state at any time since your base backup was
taken."
--
Ian.
On Mon, Aug 3, 2009 at 11:50 AM, Gnanam<gnanam(at)zoniac(dot)com> wrote:
>
> Hi,
>
> I have a basic and quick question related to "archive_timeout" command in
> PITR.
>
> I've set "archive_timeout" to 1800 seconds (30 minutes) in
> "postgresql.conf", which means WAL archives are generated every 30 minutes.
> So, if for an example my WAL archives are generated at the following time:
> 9:00 am
> 9:30 am
> 10:00 am
> 10:30 am
> 11:00 am, etc.
>
> I specify PITR recovery time at 10:15 am in "recovery.conf". My question
> is, to what time my database is recovered back? At which stage of the
> following my database is reverted back:
> 1) Exactly the database was at 10:15 am
> 2) Exactly the database was at 10:00 am, because the last WAL archive
> before 10:15 am was at 10:00 am.
>
> Regards,
> Gnanam
> --
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>
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