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Re: RAID6 r-m-w, op-journaled fs, SSDs

To: Michael Monnerie <michael.monnerie@xxxxxxxxxxxxxxxxxxx>
Subject: Re: RAID6 r-m-w, op-journaled fs, SSDs
From: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Date: Sun, 1 May 2011 11:14:26 +0200
Cc: xfs@xxxxxxxxxxx, Stan Hoeppner <stan@xxxxxxxxxxxxxxxxx>
In-reply-to: <201104302350.32287@xxxxxx>
Organization: Intellique
References: <19900.10868.583555.849181@xxxxxxxxxxxxxxxxxx> <20110430180213.6dcfc41c@xxxxxxxxxxxxxxx> <4DBC68DA.1090708@xxxxxxxxxxxxxxxxx> <201104302350.32287@xxxxxx>
Le Sat, 30 Apr 2011 23:50:31 +0200 vous écriviez:

> Just for documentation if someone sees slow I/O on Areca. More
> spindles rock. That server had 8x 10krpm WD Raptor 150G drives by the
> time.

As a side note, VMs typically creates lots of random small IOs, and
perform quite poorly on RAID-6 arrays.

Emmanuel Florac     |   Direction technique
                    |   Intellique
                    |   <eflorac@xxxxxxxxxxxxxx>
                    |   +33 1 78 94 84 02

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