From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dongsheng Yang Subject: Re: RBD volumes for bare-metal hosts Date: Tue, 12 Jul 2016 15:46:15 +0800 Message-ID: <5784A047.20200@easystack.cn> References: Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from mr213139.mail.yeah.net ([223.252.213.139]:37307 "EHLO mr213139.mail.yeah.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750779AbcGLHqV (ORCPT ); Tue, 12 Jul 2016 03:46:21 -0400 In-Reply-To: Sender: ceph-devel-owner@vger.kernel.org List-ID: To: Ilya Dryomov , Radoslaw Zarzynski Cc: Ceph Development , "Yan, Zheng" , Yunchuan Wen On 07/06/2016 07:41 AM, Ilya Dryomov wrote: > On Wed, Jul 6, 2016 at 12:16 AM, Radoslaw Zarzynski > wrote: >> Hello Guys, >> >> I wonder about a method for providing bare-metal hosts with an access >> to RBD volumes. >> >> The most obvious solution is krbd. Unfortunately, it has a substantial >> feature gap in comparison to librbd [1][2]. exclusive-lock seems to be >> the basic dependency that should be satisfied to even start thinking >> about the rest. Is someone working on this feature? What are the plans >> in general? > The code for exclusive-lock, object-map and fast-diff is pretty much > ready. Hi Ilya, Sounds great! But where can I read these code, I did not find it in https://github.com/ceph/ceph-client. could you give a reference for it. thanx a lot. Yang > We had a large prerequisite that had to go in before any of > these and it's been merged into 4.7, so it's now a matter of review and > more comprehensive testing. deep-flatten isn't ready, but should > follow shortly after. > > Note that you can disable all of these features dynamically and that > the image is perfectly usable with none of them enabled. Unless you > have clones or discard a lot, in which case object-map can help, the > I/O path is the same. > > No concrete plans for mirroring support yet. > > Thanks, > > Ilya > -- > To unsubscribe from this list: send the line "unsubscribe ceph-devel" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html >