Re: CRCs (was: beta testing version)

From: Bruce Guenter <bruceg(at)em(dot)ca>
To: "'pgsql-hackers(at)postgresql(dot)org'" <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: CRCs (was: beta testing version)
Date: 2000-12-07 21:47:07
Message-ID: 20001207154707.A1939@em.ca
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On Thu, Dec 07, 2000 at 12:22:12PM -0800, Mikheev, Vadim wrote:
> > > That's why an end marker must follow all valid records.
> > That requires an extra out-of-sequence write.
> Yes, and also increase probability to corrupt already committed
> to log data.

Are you referring to the case where the drive loses power in mid-write?
That is solved by either arranging for the markers to always be placed
at the start of a block, or by plugging in a UPS.
--
Bruce Guenter <bruceg(at)em(dot)ca> http://em.ca/~bruceg/

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