From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: Re: speedup ceph / scaling / find the bottleneck Date: Tue, 03 Jul 2012 09:49:18 +0200 Message-ID: <4FF2A3FE.7090205@profihost.ag> References: <59beaaec-5f12-4fb2-9c03-69f41849e89e@mailpro> <4FF13BEB.8080906@profihost.ag> <4FF1F4F6.4030403@profihost.ag> <4FF204DB.80709@inktank.com> Mime-Version: 1.0 Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:45412 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752086Ab2GCHtV (ORCPT ); Tue, 3 Jul 2012 03:49:21 -0400 In-Reply-To: <4FF204DB.80709@inktank.com> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Josh Durgin Cc: Gregory Farnum , Alexandre DERUMIER , Sage Weil , ceph-devel@vger.kernel.org, Mark Nelson Hello, Am 02.07.2012 22:30, schrieb Josh Durgin: > If you add admin_socket=/path/to/admin_socket for your client running > qemu (in that client's ceph.conf section or manually in the qemu > command line) you can check that caching is enabled: > > ceph --admin-daemon /path/to/admin_socket show config | grep rbd_cache > > And see statistics it generates (look for cache) with: > > ceph --admin-daemon /path/to/admin_socket perfcounters_dump This doesn't work for me: ceph --admin-daemon /var/run/ceph.sock show config read only got 0 bytes of 4 expected for response length; invalid command?2012-07-03 09:46:57.931821 7fa75d129700 -1 asok(0x8115a0) AdminSocket: request 'show config' not defined Also perfcounters does not show anything: # ceph --admin-daemon /var/run/ceph.sock perfcounters_dump {} ~]# ceph -v ceph version 0.48argonaut-2-gb576faa (commit:b576faa6f24356f4d3ec7205e298d58659e29c68) Stefan