linux-kernel - Re: [dm-devel] [PATCH v2] staging: writeboost: Add dm-writeboost

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Date:	Fri, 12 Dec 2014 18:35:32 +0900
From:	Akira Hayakawa <ruby.wktk@...il.com>
To:	bvanassche@....org
CC:	snitzer@...hat.com, gregkh@...uxfoundation.org,
	driverdev-devel@...uxdriverproject.org, thornber@...hat.com,
	linux-kernel@...r.kernel.org, dm-devel@...hat.com
Subject: Re: [dm-devel] [PATCH v2] staging: writeboost: Add dm-writeboost

On 12/12/14 6:12 PM, Bart Van Assche wrote:
> This is the first time I see someone claiming that reducing the request size improves performance. I don't know any SSD model for which splitting requests improves performance.

Writeboost batches number of writes into a log (that is 512KB large) and submits to SSD
which maximizes the throughput and the lifetime of the SSD.
I think you fairly misunderstand how Writeboost works.

- Akira
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