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Re: [RFC, PATCH 0/2] xfs: dynamic speculative preallocation for delalloc

To: <david@xxxxxxxxxxxxx>, <aelder@xxxxxxx>
Subject: Re: [RFC, PATCH 0/2] xfs: dynamic speculative preallocation for delalloc
From: <Ivan.Novick@xxxxxxx>
Date: Thu, 14 Oct 2010 17:50:15 -0400
Accept-language: en-US
Acceptlanguage: en-US
Cc: <xfs@xxxxxxxxxxx>
In-reply-to: <20101014211626.GD4681@dastard>
Thread-index: Actr6QTXYhXaG4P6Q2Wijr33fHtHEgAAMPs2
Thread-topic: [RFC, PATCH 0/2] xfs: dynamic speculative preallocation for delalloc
>> The reported numbers were a drop in read throughput of ~15% on a
>> GB/s class filesystem when the files interleaved.
I have seen ~50% performance improvement in read rate when changing from small 
extents to large extents with XFS. Essentially going from not using allocsize 
to setting 1gb allocsize.  Also GB/s class filesystem.

Cheers,
Ivan Novick

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