Re: 16-bit page checksums for 9.2

On 1/7/12 5:26 AM, Heikki Linnakangas wrote:
> Perhaps there
> needs to be a third setting, calculate-but-dont-verify, where CRCs are
> updated but existing CRCs are not expected to be correct. And a utility
> to scan through your database and fix any incorrect CRCs, so that after
> that's run in calculate-but-dont-verify mode, you can safely turn
> checksums on.

The users of any feature like this are eventually going to demand a
"scrubbing" utility that validates the checksums in a background task.
Doing something like pg_dump just to validate your copy of the data is
still clean is not a great approach. If you accept that sort of utility
is inevitable, you might as well presume it could handle this sort of
task eventually too.

--
Greg Smith 2ndQuadrant US greg(at)2ndQuadrant(dot)com Baltimore, MD
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