Re: Online Backups with 8.0 -- Confused

From: Pallav Kalva <pkalva(at)deg(dot)cc>
To: Simon Riggs <simon(at)2ndquadrant(dot)com>
Cc: Jason DiCioccio <geniusj(at)gmail(dot)com>, pgsql-admin(at)postgresql(dot)org
Subject: Re: Online Backups with 8.0 -- Confused
Date: 2005-04-01 14:30:18
Message-ID: 424D5AFA.5090800@deg.cc
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Simon Riggs wrote:

>On Thu, 2005-03-31 at 18:41 -0500, Jason DiCioccio wrote:
>
>
>
>> Now, realize that ..0022 was not in the archive directory, and
>>actually is still not. However, it seems to be requiring it. Do I
>>have to wait for this log to be archived?
>>
>>
>
>Yes.
>
>
>
>>Is there a way that I can
>>force the archival of this WAL log?
>>
>>
>
>No, other than write lots of stuff to a table.
>
>Straight answers, but I hope that helps.
>
>In retrospect, there is a slight timing error between end backup and
>archival of next WAL log. The first-release design for PITR didn't fully
>cover lower traffic situations, so in those cases the timing error
>becomes noticeable. You're not the first to observe this, though only by
>about a month.
>
>I'm considering options for the next release, since major change seems
>to be required to the basic xlog handling mechanisms.
>

If postgres is trying to read an archive log file which was not yet
generated, why cant it read from the
transaction log ? I mean the current last transaction log before you
start the restoration process, wouldnt
that work ? I tried restore couple of time on postgres 8 it didnt give
me this error, can anyone tell me how to
reproduce this error, we are planning to move to 8.0 soon and I will be
using online backups .

>
>Best Regards, Simon Riggs
>
>
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