Launchpad has imported 4 comments from the remote bug at https://bugzilla.redhat.com/show_bug.cgi?id=599091.
If you reply to an imported comment from within Launchpad, your comment will be sent to the remote bug automatically. Read more about Launchpad's inter-bugtracker facilities at https://help.launchpad.net/InterBugTracking. ------------------------------------------------------------------------ On 2010-06-02T16:38:36+00:00 Cole wrote: See https://bugs.launchpad.net/ubuntu/+source/qemu- kvm/+bug/524447/comments/5 Apparently increasing the dd block size greatly increases the speed of the domain save operation. Reply at: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/524447/comments/6 ------------------------------------------------------------------------ On 2010-06-07T17:56:00+00:00 Laine wrote: commit 20206a4bc9f1293c69eca79290a55a5fa19976d5 in libvirt git changes the dd blocksize to 1M. This decreased the time required for a save of a suspended 512MB guest from 3min47sec to 56sec. Reply at: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/524447/comments/8 ------------------------------------------------------------------------ On 2010-06-10T12:19:33+00:00 Eric wrote: An additional patch avoids the overhead of seeking to a 1M alignment: https://www.redhat.com/archives/libvir-list/2010-June/msg00239.html Reply at: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/524447/comments/9 ------------------------------------------------------------------------ On 2010-07-21T16:48:55+00:00 Daniel wrote: This is included in 0.8.2. In addition upstream QEMU has identified & fixed a flaw that had significant speed impact Reply at: https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/524447/comments/15 ** Changed in: libvirt Status: Unknown => Fix Released ** Changed in: libvirt Importance: Unknown => Medium -- You received this bug notification because you are a member of qemu- devel-ml, which is subscribed to QEMU. https://bugs.launchpad.net/bugs/524447 Title: virsh save is very slow Status in libvirt: Fix Released Status in QEMU: Fix Released Status in libvirt package in Ubuntu: Invalid Status in qemu-kvm package in Ubuntu: Fix Released Status in libvirt source package in Lucid: Won't Fix Status in qemu-kvm source package in Lucid: Fix Released Status in libvirt source package in Maverick: Won't Fix Status in qemu-kvm source package in Maverick: Won't Fix Status in qemu-kvm package in Debian: Fix Released Bug description: ================================== SRU Justification: 1. impact: 'qemu save' is slow 2. how addressed: a patch upstream fixes the case when a file does not announce when it is ready. 3. patch: see the patch in linked bzr trees 4. TEST CASE: see comment #4 for a specific recipe 5. regression potential: this patch only touches the vm save path. ================================== As reported here: http://www.redhat.com/archives/libvir- list/2009-December/msg00203.html "virsh save" is very slow - it writes the image at around 1MB/sec on my test system. (I think I saw a bug report for this issue on Fedora's bugzilla, but I can't find it now...) Confirmed under Karmic. To manage notifications about this bug go to: https://bugs.launchpad.net/libvirt/+bug/524447/+subscriptions
