linux-kernel - Re: Bcache version 9

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Message-ID: <AANLkTikHhkK8WaFxOL+HkaCY97PCvFfON8cQV0xU_-0u@mail.gmail.com>
Date:	Sat, 4 Dec 2010 00:41:20 -0500
From:	John Drescher <drescherjm@...il.com>
To:	Kent Overstreet <kent.overstreet@...il.com>
Cc:	Cédric Villemain 
	<cedric.villemain.debian@...il.com>, linux-bcache@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-fsdevel@...r.kernel.org
Subject: Re: Bcache version 9

>> Is it its main diff with flashcache ?
>> https://github.com/facebook/flashcache/blob/master/doc/flashcache-doc.txt
>
> Yeah. It's a more complex approach, but it's capable of significantly higher
> performance. Performance has regressed some lately (I've been concentrating
> on other things and don't really have the hardware for performance work),
> but a month or so ago it was benchmarking around 50% higher than flashcache,
> with mysql on an X25-E.

BTW, Thanks for releasing this..
I am just in the middle of evaluating using flashcache to speed up
slow IO in kvm clients when storing the VMs on hard disks. I will when
I get a chance try your patch..

John
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