Re: SSD + RAID

From: Peter Eisentraut <peter_e(at)gmx(dot)net>
To: Merlin Moncure <mmoncure(at)gmail(dot)com>
Cc: Greg Smith <greg(at)2ndquadrant(dot)com>, Brad Nicholson <bnichols(at)ca(dot)afilias(dot)info>, Karl Denninger <karl(at)denninger(dot)net>, Laszlo Nagy <gandalf(at)shopzeus(dot)com>, pgsql-performance <pgsql-performance(at)postgresql(dot)org>
Subject: Re: SSD + RAID
Date: 2009-11-17 17:30:13
Message-ID: 1258479013.10724.32.camel@fsopti579.F-Secure.com
Views: Raw Message | Whole Thread | Download mbox | Resend email
Thread:
Lists: pgsql-performance

On tis, 2009-11-17 at 11:36 -0500, Merlin Moncure wrote:
> I am right now talking to someone on postgresql irc who is measuring
> 15k iops from x25-e and no data loss following power plug test. I am
> becoming increasingly suspicious that peter's results are not
> representative: given that 90% of bonnie++ seeks are read only, the
> math doesn't add up, and they contradict broadly published tests on
> the internet. Has anybody independently verified the results?

Notably, between my two blog posts and this email thread, there have
been claims of

400
1800
4000
7000
14000
15000
35000

iops (of some kind) per second.

That alone should be cause of concern.

In response to

Browse pgsql-performance by date

  From Date Subject
Next Message Greg Smith 2009-11-17 18:51:13 Re: SSD + RAID
Previous Message Brad Nicholson 2009-11-17 17:10:18 Re: Is Diskeeper Automatic Mode safe?