From mboxrd@z Thu Jan  1 00:00:00 1970
From: Stefan Priebe - Profihost AG <s.priebe@profihost.ag>
Subject: Re: RBD trim / unmap support?
Date: Fri, 02 Nov 2012 09:20:03 +0100
Message-ID: <50938233.9090902@profihost.ag>
References: <509306CC.5080307@profihost.ag> <5093078C.4020404@inktank.com>
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To: Josh Durgin <josh.durgin@inktank.com>
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Am 02.11.2012 00:36, schrieb Josh Durgin:
> On 11/01/2012 04:33 PM, Stefan Priebe wrote:
>> Hello list,
>>
>> does rbd support trim / unmap? Or is it planned to support it?
>>
>> Greets,
>> Stefan
>
> librbd (and thus qemu) support it. The rbd kernel module does not yet.
> See http://ceph.com/docs/master/rbd/qemu-rbd/#enabling-discard-trim

Thanks! Is there any recommanded value for discard_granularity? With 
fstrim and iscsi i use 128kb.

Stefan