From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([2001:4830:134:3::10]:39491) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1eFH1v-0004j8-0I for qemu-devel@nongnu.org; Thu, 16 Nov 2017 05:04:24 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1eFH1t-0006s7-SY for qemu-devel@nongnu.org; Thu, 16 Nov 2017 05:04:19 -0500 References: <1510654613-47868-1-git-send-email-anton.nefedov@virtuozzo.com> <20171116032622.GB14771@lemon> From: Anton Nefedov Message-ID: <1cce700e-2de3-65c8-71c9-bf395b9f39cf@virtuozzo.com> Date: Thu, 16 Nov 2017 13:04:04 +0300 MIME-Version: 1.0 In-Reply-To: <20171116032622.GB14771@lemon> Content-Type: text/plain; charset=utf-8; format=flowed Content-Language: en-US Content-Transfer-Encoding: 7bit Subject: Re: [Qemu-devel] [PATCH 0/5] compressed block-stream List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Fam Zheng Cc: qemu-devel@nongnu.org, qemu-block@nongnu.org, kwolf@redhat.com, mreitz@redhat.com, eblake@redhat.com, stefanha@redhat.com, den@virtuozzo.com On 16/11/2017 6:26 AM, Fam Zheng wrote: > On Tue, 11/14 13:16, Anton Nefedov wrote: >> It might be useful to compress images during block-stream; >> this way the user can merge compressed images of a backing chain and >> the result will remain compressed. > > I haven't looked at the patches yet so maybe the answer is obvious, but still: > would the "compress" option be still necessary if what we have is > blockdev-stream instead? > > Fam > Sorry, I can't see blockdev-stream available now. How that would be different? Would it imply the blocks are pulled up to the top (active) image? Or did you mean block-commit? The option might be useful there as well, and needs to be implemented separately /Anton