From: Alphe Salas <asalas@kepler.cl>
To: Christoph Hellwig <hch@infradead.org>, Sage Weil <sweil@redhat.com>
Cc: ceph-devel <ceph-devel@vger.kernel.org>
Subject: Re: Forever growing data in ceph using RBD image
Date: Thu, 17 Jul 2014 15:19:08 -0400 [thread overview]
Message-ID: <53C821AC.1080307@kepler.cl> (raw)
In-Reply-To: <20140717185714.GA10709@infradead.org>
I don t use QEMU /KVM just a plain regular rbd image format 1 map and
mounted to a real machine that is used as proxy for data droping to ceph.
---
Alphe Salas
I.T ingeneer
On 07/17/2014 02:57 PM, Christoph Hellwig wrote:
> On Thu, Jul 17, 2014 at 11:27:31AM -0700, Sage Weil wrote:
>> I assume you are using kvm/qemu? It may be that older versions aren't
>> passing through trims; Josh would know more. Or maybe the trim sizes are
>> too small to let rados effectively deallocate entire objects. Logs might
>> help there.
>
> At least for the qemu version from a few month ago that I'm using in my
> testing I explicitly have to enable passthrough of UNMAP/TRIM on the
> qemu command line.
>
next prev parent reply other threads:[~2014-07-17 19:19 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-07-17 14:11 Forever growing data in ceph using RBD image Alphe Salas
2014-07-17 16:35 ` Sage Weil
2014-07-17 18:13 ` Alphe Salas
2014-07-17 18:27 ` Sage Weil
2014-07-17 18:53 ` Alphe Salas
2014-07-17 18:57 ` Christoph Hellwig
2014-07-17 19:19 ` Alphe Salas [this message]
2014-07-17 19:28 ` Sage Weil
2014-07-17 21:24 ` Alphe Salas
2014-08-06 19:02 ` Alphe Salas
2014-07-17 16:47 ` Christoph Hellwig
2014-07-17 18:17 ` Alphe Salas
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