Message-ID: <548AD461.1020707@acm.org>
Date: Fri, 12 Dec 2014 12:41:21 +0100
From: Bart Van Assche <bvanassche@acm.org>
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To: Akira Hayakawa <ruby.wktk@gmail.com>
CC: snitzer@redhat.com, gregkh@linuxfoundation.org,
        driverdev-devel@linuxdriverproject.org, thornber@redhat.com,
        linux-kernel@vger.kernel.org, dm-devel@redhat.com,
        Mark Ruijter <mruijter@gmail.com>
Subject: Re: [dm-devel] [PATCH v2] staging: writeboost: Add dm-writeboost
References: <54883195.1060304@gmail.com> <20141211152626.GA8196@redhat.com> <548A39E7.80508@gmail.com> <548AB172.4000103@acm.org> <548AB6E4.2020302@gmail.com>
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On 12/12/14 10:35, Akira Hayakawa wrote:
> 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.

Does this mean that dm-writeboost is similar to btier ? If so, this 
makes me wonder which of these two subsystems would be the best 
candidate for upstream inclusion. As far as I know btier doesn't split 
bio's. The source code of btier can be downloaded from 
http://sourceforge.net/projects/tier/.

Bart.

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