Re: Enabling Checksums

From: Jim Nasby <jim(at)nasby(dot)net>
To: Jeff Davis <pgsql(at)j-davis(dot)com>
Cc: Heikki Linnakangas <hlinnakangas(at)vmware(dot)com>, Simon Riggs <simon(at)2ndQuadrant(dot)com>, Greg Smith <greg(at)2ndquadrant(dot)com>, PostgreSQL-development <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Enabling Checksums
Date: 2013-03-04 20:51:55
Message-ID: 5135096B.6060003@nasby.net
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On 3/4/13 10:00 AM, Jeff Davis wrote:
> On Mon, 2013-03-04 at 10:36 +0200, Heikki Linnakangas wrote:
>> >On 04.03.2013 09:11, Simon Riggs wrote:
>>> > >Are there objectors?
>> >
>> >FWIW, I still think that checksumming belongs in the filesystem, not
>> >PostgreSQL.
> Doing checksums in the filesystem has some downsides.

Additionally, no filesystem I'm aware of checksums the data in the filesystem cache. A PG checksum would.

I'll also mention that this debate has been had in the past. The time to object to the concept of a checksuming feature was a long time ago, before a ton of development effort went into this... :(

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