From: | Naomi Walker <nwalker(at)eldocomp(dot)com> |
---|---|
To: | Scott Marlowe <scott(dot)marlowe(at)gmail(dot)com> |
Cc: | Michael Monnerie <michael(dot)monnerie(at)is(dot)it-management(dot)at>, pgsql-admin(at)postgresql(dot)org |
Subject: | Re: 8.3.5 broken after power fail SOLVED |
Date: | 2009-02-21 14:34:53 |
Message-ID: | 49A0110D.8020302@eldocomp.com |
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Thread: | |
Lists: | pgsql-admin |
Other than disaster tests, how would I know if I have an system that
lies about fsync?
>
> We preach this again and again. PostgreSQL can only survive a power
> outage type failure ONLY if the hardware / OS / filesystem don't lie
> about fsync. If they do, all bets are off, and this kind of failure
> means you should really failover to another machine or restore a
> backup.
>
> It's why you have to do possibly destructive tests to see if your
> server stands at least some chance of surviving this kind of failure,
> log shipping for recovery, and / or replication of another form (slony
> etc...) to have a reliable server.
>
> The recommendations for recovery of data are just that, recovery
> oriented. They can't fix a broken database at that point. You need
> to take it offline after this kind of failure if you can't trust your
> hardware.
>
> Usually when it finds something wrong it just won't start up.
>
>
--
------------------------------------------------------------------------
Naomi Walker Chief Information Officer
Eldorado Computing, Inc nwalker(at)eldocomp(dot)com
---An EDS Company 602-604-3100
------------------------------------------------------------------------
Hard things are put in our way, not to stop us, but to call out our
courage and strength. -- Anonymous
------------------------------------------------------------------------
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