From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Robin H. Johnson" Subject: Re: Experiences with Ceph at the June'14 issue of USENIX ;login: Date: Mon, 2 Jun 2014 21:40:40 +0000 Message-ID: <20140602214040.GG4356@orbis-terrarum.net> References: <20140602183219.GD17479@philipgian-mac> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from smtp.gentoo.org ([140.211.166.183]:46182 "EHLO smtp.gentoo.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753103AbaFBVkq (ORCPT ); Mon, 2 Jun 2014 17:40:46 -0400 Received: from grubbs.orbis-terrarum.net (localhost [127.0.0.1]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (256/256 bits)) (No client certificate requested) by smtp.gentoo.org (Postfix) with ESMTPS id 8D0CC33FDF9 for ; Mon, 2 Jun 2014 21:40:45 +0000 (UTC) Content-Disposition: inline In-Reply-To: <20140602183219.GD17479@philipgian-mac> Sender: ceph-devel-owner@vger.kernel.org List-ID: To: ceph-devel@vger.kernel.org On Mon, Jun 02, 2014 at 09:32:19PM +0300, Filippos Giannakos wrote: > As you may already know, we have been using Ceph for quite some time now to back > the ~okeanos [1] public cloud service, which is powered by Synnefo [2]. (Background info for other readers: Synnefo is a cloud layer on top of Ganeti). > In the article we describe our storage needs, how we use Ceph and how it has > worked so far. I hope you enjoy reading it. Are you just using the existing kernel RBD mapping for Ganeti running KVM, or did you implement the pieces for Ganeti to use the QEMU userspace RBD driver? I've got both Ceph & Ganeti clusters already, but am reluctant to marry the two sets of functionality because the kernel RBD driver still seemed to perform so much worse than the Qemu userspace RBD driver, and Ganeti still hasn't implemented the userspace mapping pieces :-( -- Robin Hugh Johnson Gentoo Linux: Developer, Infrastructure Lead E-Mail : robbat2@gentoo.org GnuPG FP : 11ACBA4F 4778E3F6 E4EDF38E B27B944E 34884E85