From mboxrd@z Thu Jan 1 00:00:00 1970 From: Stefan Priebe - Profihost AG Subject: optmize librbd for iops Date: Mon, 12 Nov 2012 14:50:14 +0100 Message-ID: <50A0FE96.9030708@profihost.ag> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mail.profihost.ag ([85.158.179.208]:37838 "EHLO mail.profihost.ag" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752027Ab2KLNuR (ORCPT ); Mon, 12 Nov 2012 08:50:17 -0500 Sender: ceph-devel-owner@vger.kernel.org List-ID: To: "ceph-devel@vger.kernel.org" Hello list, are there any plans to optimize librbd for iops? Right now i'm able to get 50.000 iop/s via iscsi and 100.000 iop/s using multipathing with iscsi. With librbd i'm stuck to around 18.000iops. As this scales with more hosts but not with more disks in a vm. It must be limited by rbd implementation in kvm / librbd. Greets, Stefan