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Re: XFS: Abysmal write performance because of excessive seeking (allocat

To: Emmanuel Florac <eflorac@xxxxxxxxxxxxxx>
Subject: Re: XFS: Abysmal write performance because of excessive seeking (allocation groups to blame?)
From: Stefan Ring <stefanrin@xxxxxxxxx>
Date: Mon, 9 Apr 2012 14:53:14 +0200
Cc: stan@xxxxxxxxxxxxxxxxx, Linux fs XFS <xfs@xxxxxxxxxxx>
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>> So 150 MB/sec seems to be the
>> best these disks can do,
>
> Definitely NOT right. I mean I've got routinely 600 MB/s from 8 7.2K
> drives RAID-6 arrays. Unless cache is off, which RAID-6 isn't obviously
> thought for.

In this case it was a 2-disk RAID 1, so it’s 150 MB/s per disk. Seems
quite right to me.

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