Re: Enabling Checksums

Heikki Linnakangas <hlinnakangas@vmware.com>

From: Heikki Linnakangas <hlinnakangas@vmware.com>
To: Jeff Davis <pgsql@j-davis.com>
Cc: Simon Riggs <simon@2ndQuadrant.com>, Greg Smith <greg@2ndquadrant.com>, PostgreSQL-development <pgsql-hackers@postgresql.org>
Date: 2013-03-04T21:22:01Z
Lists: pgsql-hackers
On 04.03.2013 23:00, Jeff Davis wrote:
> On Mon, 2013-03-04 at 22:27 +0200, Heikki Linnakangas wrote:
>> Yeah, fragmentation will certainly hurt some workloads. But how badly,
>> and which workloads, and how does that compare with the work that
>> PostgreSQL has to do to maintain the checksums? I'd like to see some
>> data on those things.
>
> I think we all would. Btrfs will be a major filesystem in a few years,
> and we should be ready to support it.

Perhaps we should just wait a few years? If we suspect that this becomes 
obsolete in a few years, it's probably better to just wait, than add a 
feature we'll have to keep maintaining. Assuming it gets committed 
today, it's going to take a year or two for 9.3 to get released and all 
the bugs ironed out, anyway.

- Heikki