: Re: [ceph-users] RBD Caching - How to enable?
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OK, so I need to change ceph.conf on the compute nodes?
yes.
Do the VMs using RBD images need to be restarted at all?
I think yes.
Anything
On 02/07/2014 03:11 AM, Alexandre DERUMIER wrote:
This page reads If you set rbd_cache=true, you must set cache=writeback or
risk data loss. ...
if you enable writeback,guest send flush request. If the host is crashing,
you'll lost datas but it'll not corrupt the guest filesystem.
So the
Hi,
I've got a few VMs in Ceph RBD that are running very slowly - presumably
down to a backfill after increasing the pg_num of a big pool.
Would RBD caching resolve that issue? If so, how do I enable it? The
documentation states that setting rbd cache = true in [global] enables
it, but
-users@lists.ceph.com
Envoyé: Jeudi 6 Février 2014 11:43:56
Objet: [ceph-users] RBD Caching - How to enable?
Hi,
I've got a few VMs in Ceph RBD that are running very slowly - presumably down
to a backfill after increasing the pg_num of a big pool.
Would RBD caching resolve that issue? If so
.conf :)
http://ceph.com/docs/next/rbd/qemu-rbd/
- Mail original -
De: Graeme Lambert glamb...@adepteo.net
À: Alexandre DERUMIER aderum...@odiso.com
Cc: ceph-users@lists.ceph.com
Envoyé: Jeudi 6 Février 2014 12:03:00
Objet: Re: [ceph-users] RBD Caching - How to enable?
Hi
On Thu, Feb 6, 2014 at 12:11 PM, Alexandre DERUMIER aderum...@odiso.com wrote:
Do the VMs using RBD images need to be restarted at all?
I think yes.
In our case, we had to restart the hypervisor qemu-kvm process to
enable caching.
Cheers, Dan
___
Does anybody else think there is a problem with the docs/settings here...
Message: 13
Date: Thu, 06 Feb 2014 12:11:53 +0100 (CET)
From: Alexandre DERUMIER aderum...@odiso.com
To: Graeme Lambert glamb...@adepteo.net
Cc: ceph-users@lists.ceph.com
Subject: Re: [ceph-users] RBD Caching - How
