From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from [140.186.70.92] (port=39824 helo=eggs.gnu.org) by lists.gnu.org with esmtp (Exim 4.43) id 1OWYbZ-0006fs-Cl for qemu-devel@nongnu.org; Wed, 07 Jul 2010 13:40:19 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.69) (envelope-from ) id 1OWYbX-0005l4-QZ for qemu-devel@nongnu.org; Wed, 07 Jul 2010 13:40:17 -0400 Received: from gwu.lbox.cz ([62.245.111.132]:38560) by eggs.gnu.org with esmtp (Exim 4.69) (envelope-from ) id 1OWYbX-0005kT-F4 for qemu-devel@nongnu.org; Wed, 07 Jul 2010 13:40:15 -0400 Date: Wed, 7 Jul 2010 19:40:13 +0200 From: Nikola Ciprich Subject: Re: [Qemu-devel] [Bug 524447] Re: virsh save is very slow Message-ID: <20100707174013.GA4864@nik-comp.linuxbox.cz> References: <20100219141749.18571.12250.malonedeb@wampee.canonical.com> <20100622190208.24319.86224.malone@palladium.canonical.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20100622190208.24319.86224.malone@palladium.canonical.com> Content-Transfer-Encoding: quoted-printable List-Id: qemu-devel.nongnu.org List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Bug 524447 <524447@bugs.launchpad.net> Cc: nikola.ciprich@linuxbox.cz, mjt@tls.msk.ru, qemu-devel@nongnu.org Hi, just wanted to report, I just tried libvirt-0.8.2 which should use la= rger dd blocksize. save is still painfully slow, about 1MB/s while host is totally idle... regards nik On Tue, Jun 22, 2010 at 07:02:08PM -0000, Serge Hallyn wrote: > Just a note that the 0.8.1 release available in maverick gives me about > a 50-second save for a 512M memory image (producing 100M outfile). The > patch listed above and suspected of speeding the saves is not in 0.8.1. > When I hand-apply just that patch, saves take about 8 seconds, but > restore fails. Presumably taking the whole of latest git (or 0.8.2 > whenever it is released) will result in both working and fast > save/restore. >=20 > --=20 > virsh save is very slow > https://bugs.launchpad.net/bugs/524447 > You received this bug notification because you are a member of qemu- > devel-ml, which is subscribed to QEMU. >=20 > Status in libvirt virtualization API: Unknown > Status in QEMU: Invalid > Status in =E2=80=9Clibvirt=E2=80=9D package in Ubuntu: Confirmed > Status in =E2=80=9Cqemu-kvm=E2=80=9D package in Ubuntu: Confirmed >=20 > Bug description: > As reported here: http://www.redhat.com/archives/libvir-list/2009-Decem= ber/msg00203.html >=20 > "virsh save" is very slow - it writes the image at around 1MB/sec on my= test system. >=20 > (I think I saw a bug report for this issue on Fedora's bugzilla, but I = can't find it now...) >=20 > Confirmed under Karmic. >=20 >=20 >=20 >=20 --=20 ------------------------------------- Ing. Nikola CIPRICH LinuxBox.cz, s.r.o. 28. rijna 168, 709 01 Ostrava tel.: +420 596 603 142 fax: +420 596 621 273 mobil: +420 777 093 799 www.linuxbox.cz mobil servis: +420 737 238 656 email servis: servis@linuxbox.cz -------------------------------------