From mboxrd@z Thu Jan 1 00:00:00 1970 From: Paolo Bonzini Subject: Re: Is there any solution in KVM that like VAAI does in EXSI Date: Wed, 27 Feb 2013 18:23:43 +0100 Message-ID: <512E411F.9050002@redhat.com> References: <20130226151333.GA8662@stefanha-thinkpad.redhat.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: Timon Wang , kvm@vger.kernel.org To: Stefan Hajnoczi Return-path: Received: from mail-qa0-f51.google.com ([209.85.216.51]:51052 "EHLO mail-qa0-f51.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1760546Ab3B0RXs (ORCPT ); Wed, 27 Feb 2013 12:23:48 -0500 Received: by mail-qa0-f51.google.com with SMTP id cr7so660845qab.17 for ; Wed, 27 Feb 2013 09:23:47 -0800 (PST) In-Reply-To: <20130226151333.GA8662@stefanha-thinkpad.redhat.com> Sender: kvm-owner@vger.kernel.org List-ID: Il 26/02/2013 16:13, Stefan Hajnoczi ha scritto: >> > Is there any solution in KVM that works like VAAI does in EXSI, I >> > found a PPT that posted in Sep. 2012, which said that storage offload >> > will be consider in future. >> > I am wondering anybody knows about this, or provide some information about this? > Thin Provisioning support is being added to QEMU. Some configurations > already work - virtio-scsi on a block device or raw file supports > discard, for example. > > Linux recently got Zero Blocks support in the form of the BLKZEROOUT > ioctl. It is not being exploited by QEMU or libvirt yet. > > Copy Offload, not aware of active development. Perhaps libvirt or > libstoragemgmt will support it. Copy offload is in the works (still at the whiteboard stage, though). Paolo