RE: CRCs

From: "Mikheev, Vadim" <vmikheev(at)SECTORBASE(dot)COM>
To: "'pgsql-hackers(at)postgresql(dot)org'" <pgsql-hackers(at)postgresql(dot)org>
Subject: RE: CRCs
Date: 2001-01-12 22:16:07
Message-ID: 8F4C99C66D04D4118F580090272A7A234D3276@sectorbase1.sectorbase.com
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> > You know - this is *core* assumption. If drive lies about this then
> > *nothing* will help you. Do you remember core rule of WAL?
> > "Changes must be logged *before* changed data pages written".
> > If this rule will be broken then data files will be inconsistent
> > after crash recovery and you will not notice this, w/wo CRC in
> > data blocks.
>
> You can include the data blocks' CRCs in the log entries.

How could it help?

Vadim

Responses

  • Re: CRCs at 2001-01-12 22:54:45 from Nathan Myers

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