From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: Re: how to debug slow rbd block device Date: Wed, 23 May 2012 09:22:50 +0200 Message-ID: <4FBC904A.7090407@profihost.ag> References: <4FBB8A5B.9010500@profihost.ag> <4FBBEBC8.1000205@profihost.ag> <1C70F3FB753C4AEC97247E04FAE3C733@inktank.com> <4FBBF74C.9020608@profihost.ag> <45F1742481D84E7A90951816DB23609F@inktank.com> <4FBBFE7B.4060406@profihost.ag> <65E9589544C4489F93761035433ADC01@inktank.com> <4FBC811F.5060004@profihost.ag> <4FBC83F3.7070400@inktank.com> <4FBC8B41.1020300@profihost.ag> <4FBC8F8F.6060004@inktank.com> Mime-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:58534 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932116Ab2EWHWn (ORCPT ); Wed, 23 May 2012 03:22:43 -0400 In-Reply-To: <4FBC8F8F.6060004@inktank.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Josh Durgin Cc: Greg Farnum , ceph-devel@vger.kernel.org Am 23.05.2012 09:19, schrieb Josh Durgin: > On 05/23/2012 12:01 AM, Stefan Priebe - Profihost AG wrote: > You can use any of the rbd-specific options (like rbd_cache_max_dirty) > with qemu >= 0.15. > > You can set them in a global ceph.conf file, or specify them on the qemu > command line like: > > qemu -m 512 -drive > file=rbd:pool/image:rbd_cache_max_dirty=0:rbd_cache=true,format=raw,if=virtio ah thanks and sorry. Is there a way to verify which options are active / working on a specific rbd block device? Stefan