Hi Everyone,

Is there any way to trick an instance into starting when you just have base, global, pg_clog, pg_mulitxact, pg_subtrans, pg_tblspc, & pg_twophase, butno pg_xlog?

We weren't backing up the pg_xlog, because we didn't think we needed it, but the backup_label seems to need it. Even if we take the backup_label file out, and try to start postgres, it doesn't start.

I'm going to start experimenting and testing to see if I can trick it to starting, but if anyone has any insight that would help. We noticed this on a test restore, so it wasn't a major problem, now we are backing up the pg_xlog files as well.

~DjK


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On 02/11/2007, dx k9 <bitsandbytes88@hotmail.com> wrote:
>
> Hi Everyone,
>
> Is there any way to trick an instance into starting when you just have
> base, global, pg_clog, pg_mulitxact, pg_subtrans, pg_tblspc, & pg_twophase,
> but no pg_xlog?
>
> We weren't backing up the pg_xlog, because we didn't think we needed it,
> but the backup_label seems to need it. Even if we take the backup_label
> file out, and try to start postgres, it doesn't start.
>
> I'm going to start experimenting and testing to see if I can trick it to
> starting, but if anyone has any insight that would help. We noticed thison
> a test restore, so it wasn't a major problem, now we are backing up the
> pg_xlog files as well.
>
> ~DjK
>
>
> ------------------------------
> Windows Live Hotmail and Microsoft Office Outlook – together at last. Get
> it now!<http://office.microsoft.com/en-us/outlook/HA102225181033.aspx?pid=CL100626971033>
>

Please reread the instructions on pitr and then create an empty pg_xlog
directory it can then be filled using what ever you have set
"restore_command" to.
I guess thats what you want to achieve?

Peter.

dx k9 <bitsandbytes88@hotmail.com> writes:
> Is there any way to trick an instance into starting when you just have base, global, pg_clog, pg_mulitxact, pg_subtrans, pg_tblspc, & pg_twophase, but no pg_xlog?

pg_resetxlog would probably be enough to get it to start, but the odds
of having a non-corrupt database afterwards don't seem very good.

> We weren't backing up the pg_xlog, because we didn't think we needed it, but the backup_label seems to need it. Even if we take the backup_label file out, and try to start postgres, it doesn't start.

Have you read the manual's chapter on backup/restore? There are several
documented ways to do things successfully, but inventing your own is not
likely to work.

regards, tom lane

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