Re: CRCs (was Re: [GENERAL] Re: Loading optimization)

> "Mikheev, Vadim" <vmikheev@SECTORBASE.COM> writes:
> >> Actually, I'd expect the CRC check to catch an all-zeroes page (if
> >> it fails to complain, then you misimplemented the CRC), so that would
> >> be the place to deal with it now.
> 
> > I've used standard CRC32 implementation you pointed me to -:)
> > But CRC is used in WAL records only.
> 
> Oh.  I thought we'd agreed that a CRC on each stored disk block would
> be a good idea as well.  I take it you didn't do that.


No, I thought we agreed disk block CRC was way overkill.  If the CRC on
the WAL log checks for errors that are not checked anywhere else, then
fine, but I thought disk CRC would just duplicate the I/O subsystem/disk
checks.

--  Bruce Momjian                        |  http://candle.pha.pa.us pgman@candle.pha.pa.us               |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026