Re: Block-level CRC checks - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Block-level CRC checks
Date
Msg-id 23549.1222876590@sss.pgh.pa.us
Whole thread Raw
In response to Re: Block-level CRC checks  (Paul Schlie <schlie@comcast.net>)
Responses Re: Block-level CRC checks
Re: Block-level CRC checks
Re: Block-level CRC checks
List pgsql-hackers
Paul Schlie <schlie@comcast.net> writes:
> - yes, if you're willing to compute true CRC's as opposed to simpler
> checksums, which may be worth the price if in fact many/most data
> check failures are truly caused by single bit errors somewhere in the
> chain,

FWIW, not one of the corrupted-data problems I've investigated has ever
looked like a single-bit error.  So the theoretical basis for using a
CRC here seems pretty weak.  I doubt we'd even consider automatic repair
attempts anyway.
        regards, tom lane


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