[Qemu-devel] [Bug 524447] Re: virsh save is very slow
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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Just wanted to say thanks to everyone who got this fix out. Works great! -- 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 virtualization API: Unknown 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
This bug was fixed in the package qemu-kvm - 0.12.3+noroms-0ubuntu9.18 --- qemu-kvm (0.12.3+noroms-0ubuntu9.18) lucid-proposed; urgency=low [ Michael Tokarev ] * QEMUFileBuffered:-indicate-that-were-ready-when-the-underlying-file-is-ready.diff (patch from upstream to speed up migration dramatically) (closes: #597517) (LP: #524447) [ Serge Hallyn ] * debian/control: make qemu-common replace qemu ( 0.12.3+noroms-0ubuntu9.17) (LP: #592010) -- Serge Hallyn serge.hal...@ubuntu.com Mon, 13 Feb 2012 11:24:18 -0600 ** Changed in: qemu-kvm (Ubuntu Lucid) Status: Fix Committed = Fix Released -- 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 virtualization API: Unknown 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
I tested that other bug. As far as I can tell it is not fixed. I haven't gotten any sort of response on it for a week. So... now what? -- 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 virtualization API: Unknown 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 Committed 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Is something holding up the release to lucid-updates? -- 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 virtualization API: Unknown 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 Committed 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Ben, yes, sorry I missed the fact that there was already another bug that needs verification in lucid-proposed. Bug #592010 needs to be verified, or reverted, before this one can proceed to lucid-updates. Verification is tricky, since one needs to do a hardy - lucid upgrade to verify it. -- 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 virtualization API: Unknown 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 Committed 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
I'll go stand up some vms to test that one out. -- 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 virtualization API: Unknown 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 Committed 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Thanks Jeff! Barring any regressions being reported, this should arrive in lucid-updates around the 24th. ** Tags removed: verification-needed ** Tags added: verification-done -- 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 virtualization API: Unknown 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 Committed 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Lucid 10.04.4 amd64 host. 2.6.32-38-server. All packages up to date. Guest: Win 7 64bit 1Gb RAM (all in use in guest) 2 vproc VirtIO disk (virtio-win-0.1-22) VirtIO network 2 IDE cdroms VNC display virsh save: 0.12.3+noroms-0ubuntu9.17 503.8 seconds 0.12.3+noroms-0ubuntu9.18 26.4 seconds Tested virsh start, stop, save, restore, suspend, resume, shutdown, destroy. All works as expected. Guest functionality unchanged. -- 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 virtualization API: Unknown 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 Committed 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Hello Chris, or anyone else affected, Accepted qemu-kvm into lucid-proposed. The package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance! ** Changed in: qemu-kvm (Ubuntu Lucid) Status: New = Fix Committed ** Tags removed: verification-done ** Tags added: verification-needed -- 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 virtualization API: Unknown 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 Committed 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
** Changed in: qemu-kvm (Ubuntu Lucid) Status: Won't Fix = New -- 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 virtualization API: Unknown 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: New 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
@Serge @Chris - So it sounds like this _could_ make it into Lucid? Anyone I can bribe to make that happen? As an aside, I have been running LTS versions for 8 years and I must say it seems we need a different priority scale for LTS. This bug renders the use of kvm in 10.04 very painful and the plan would be to let that exist for 5 years? Feels like a lot of key improvements are overlooked because they don't make your machine explode, but from a sys admins perspective, it feels like the risks of running the latest versions so bug fixes trickle in outweighs the missing bits in an unmaintained LTS :/ This issue + this one (https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/555981) makes for a sad day. -- 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 virtualization API: Unknown 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: Won't Fix 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
** Changed in: qemu-kvm (Debian) Status: Unknown = Fix Released -- 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 virtualization API: Unknown 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: Won't Fix 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
I see activity around this bug is going on and on, but I don't understand -- is the talk about this patch -- http://anonscm.debian.org/gitweb/?p=collab-maint/qemu-kvm.git;a=commit;h=7e32b4ca0ea280a2e8f4d9ace1a15d5e633d9a95 ? -- 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 virtualization API: Unknown 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: Won't Fix Status in “libvirt” source package in Maverick: Won't Fix Status in “qemu-kvm” source package in Maverick: Won't Fix 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Michael: Yes, that is the correct patch. -- 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 virtualization API: Unknown 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: Won't Fix Status in “libvirt” source package in Maverick: Won't Fix Status in “qemu-kvm” source package in Maverick: Won't Fix 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
I just wanted to point out that we've this patch in Debian since ages, and it's been included in upstream for a long time too. Added a debbug reference for this as well. ** Bug watch added: Debian Bug tracker #597517 http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=597517 ** Also affects: qemu-kvm (Debian) via http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=597517 Importance: Unknown Status: Unknown -- 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 virtualization API: Unknown 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: Won't Fix 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: Unknown 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
I'm sorry, the lucid qemu-kvm update has been superseded by a security update in 0.12.3+noroms-0ubuntu9.15. -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: Fix Committed Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
I'm sorry - per the rules listed in https://wiki.ubuntu.com/StableReleaseUpdates, only bugs which are = high priority are eligible for SRU. If you feel this bug should be high priority, please say so (with rationale) here. An updated package for lucid through natty will be placed in the ubuntu- virt ppa (https://launchpad.net/~ubuntu-virt/+archive/ppa) as an alternative way to get this fix. ** Changed in: qemu-kvm (Ubuntu Lucid) Status: Fix Committed = Won't Fix ** Changed in: qemu-kvm (Ubuntu Maverick) Status: In Progress = Won't Fix ** Changed in: libvirt (Ubuntu Lucid) Status: New = Won't Fix ** Changed in: libvirt (Ubuntu Maverick) Status: New = Won't Fix -- 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 virtualization API: Unknown 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: Won't Fix Status in “libvirt” source package in Maverick: Won't Fix Status in “qemu-kvm” source package in Maverick: Won't Fix 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
The page you referenced doesn't include anything that I can find about the ticket priority level. It states that Stable release updates will, in general, only be issued in order to fix high-impact bugs and provides several examples. Among them is Bugs which do not fit under above categories, [security vulnerabilities, severe regressions, or loss of user data] but (1) have an obviously safe patch and (2) affect an application rather than critical infrastructure packages (like X.org or the kernel). I submit that this is an obviously safe patch. The change is small, simple, isolated, has been tested to work, and doesn't change any interfaces. Is qemu-kvm considered a critical infrastructure package or not? I don't know the answer to that, but I can see valid arguments both for and against. I also have an example of a potential data loss situation, though it is admittedly somewhat weak. I'll spare everyone the narrative but I'll share it if it would be helpful. -- 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 virtualization API: Unknown 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: Won't Fix Status in “libvirt” source package in Maverick: Won't Fix Status in “qemu-kvm” source package in Maverick: Won't Fix 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Serge - why do you think this can't be SRU'd? It's already been accepted into lucid-proposed once, then verified, and the only reason it's not in lucid-updates is that it got superseded by a security upload before the 7-day testing period had elapsed. If you made a new upload to lucid-proposed based on the new security upload I see no reason why it couldn't be accepted and then copied to -updates after it's been verified and the 7-day testing period has ended. -- 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 virtualization API: Unknown 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: Won't Fix Status in “libvirt” source package in Maverick: Won't Fix Status in “qemu-kvm” source package in Maverick: Won't Fix 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Jeff thanks for the testing! I'll take that as verification.. marking verification-done. It just needs to wait 7 days to clear -proposed in case it causes any unintended regressions. ** Tags removed: verification-needed ** Tags added: verification-done -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: Fix Committed Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Hello Chris, or anyone else affected, Accepted qemu-kvm into lucid-proposed, the package will build now and be available in a few hours. Please test and give feedback here. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you in advance! ** Changed in: qemu-kvm (Ubuntu Lucid) Status: In Progress = Fix Committed -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: Fix Committed Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Tested 0.12.3+noroms-0ubuntu9.14 on Lucid amd64 with all available updates. Save speed is now approx 3 seconds for a 256Mb guest. Tested virsh with start, stop, save, restore, suspend, resume, shutdown, destroy. Tested guest with smp, virtio disk, virtio net, vnc display. Everything worked as expected. If there's more I can do, let me know. Thanks! -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: Fix Committed Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
I'd like to help get this fixed, particularly in Lucid. What can I do? Does #21 and #22 still need testing? -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
@Jeff, they do still need testing. However at this point new ones need to be generated. There is a bit of a backlog on libvirt updates to push. Depending on how those go, I could get packages into -proposed either next week or in 2-3 weeks. I'll make a note to queue this, and ping here when I've pushed a fix to -proposed, asking you to test. Thanks! -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Oops, this is for qemu-kvm, not libvirt. That can go immediately. -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
(setting importance to medium because it has a moderate impact on a core application, and especially because it has no workaround) ** Changed in: qemu-kvm (Ubuntu Lucid) Importance: Undecided = Medium ** Changed in: qemu-kvm (Ubuntu Maverick) Importance: Undecided = 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Ok, great! Thanks for the quick response. I did just now get finished testing the packages you attached in #21 using my lucid box. Saves of a 256Mb guest went from ~50 seconds to ~3. So it does seem to fix the issue. I can set up a Maverick box if you need it tested there as well. I checked for basic functionality with the packages you provided and the basics seem to work, (virsh start, stop, restore, save. Guest disk, net, vnc) but I didn't do much more. How deep should I go testing for regressions? -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Actually maverick is waiting for a fix for bug 790145 to be verified, but lucid is free. I've uploaded the proposed fix to lucid-proposed, it's waiting for an SRU admin to approve it. I will also post the amd64 lucid .debs at http://people.canonical.com/~serge/qemu-slow-save/. -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Using ubuntu natty narwhal installed today (2011-03-24) I tried to do a snapshot with the help of libvirt. Here are the results using natty version of qemu-kvm and libvirt and using presented slowdown packages. root@koberec:~# time virsh snapshot-create 1 Domain snapshot 1300968929 created real4m39.594s user0m0.000s sys 0m0.020s root@koberec:~# cd /storage/slowsave/ root@koberec:/storage/slowsave# dpkg -l | grep -E 'libvirt|qemu' ii libvirt-bin 0.8.8-1ubuntu5 the programs for the libvirt library ii libvirt00.8.8-1ubuntu5 library for interfacing with different virtualization systems ii qemu-common 0.14.0+noroms-0ubuntu3 qemu common functionality (bios, documentation, etc) ii qemu-kvm0.14.0+noroms-0ubuntu3 Full virtualization on i386 and amd64 hardware root@koberec:/storage/slowsave# dpkg -r qemu-common qemu-kvm root@koberec:/storage/slowsave# dpkg -i qemu-common_0.12.5+noroms-0ubuntu7.2_all.deb qemu-kvm_0.12.5+noroms-0ubuntu7.2_amd64.deb root@koberec:/storage/slowsave# pkill kvm; sleep 5; service libvirt-bin restart root@koberec:/storage/slowsave# time virsh snapshot-create 1 Domain snapshot 1300969754 created real2m22.055s user0m0.000s sys 0m0.010s root@koberec:/storage/slowsave# qemu-img snapshot -l /storage/debian.qcow2 | tail -n 1 8 1300969754 57M 2011-03-24 08:29:14 00:03:37.652 root@koberec:/storage/slowsave# virsh console 1 Connected to domain vm Escape character is ^] Debian GNU/Linux 5.0 debian ttyS0 debian login: root Password: Last login: Thu Mar 24 08:15:18 EDT 2011 on ttyS0 Linux debian 2.6.26-2-amd64 #1 SMP Thu Sep 16 15:56:38 UTC 2010 x86_64 The programs included with the Debian GNU/Linux system are free software; the exact distribution terms for each program are described in the individual files in /usr/share/doc/*/copyright. Debian GNU/Linux comes with ABSOLUTELY NO WARRANTY, to the extent permitted by applicable law. debian:~# free -m total used free sharedbuffers cached Mem: 561 39521 0 4 16 -/+ buffers/cache: 19542 Swap: 478 0478 debian:~# root@koberec:/storage/slowsave# dd if=/dev/urandom of=/storage/emptyfile bs=1M count=40 40+0 records in 40+0 records out 41943040 bytes (42 MB) copied, 5.4184 s, 7.7 MB/s I am not sure if my measurements are relevant to anything in here, but I hope so. -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Thanks for that info. That is unexpected. Could you send the xml description of the domain you were snapshotting, as well as the format of the backing file (i.e. qemu-img info filename.img) and what filesystem it is stored on (or whether it is LVM)? I'd like to try to reproduce it. Since you are seeing this in natty, it seems certain that while your symptom is the same as that in the original bug report, the cause is different. So it may be best to open a new bug report to track down the new issue in natty. -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
To be clear, please re-install the stock natty packages, do a virsh snapshot-create, and then do 'ubuntu-bug libvirt-bin' to file a new bug. Then please give the info I asked for in comment 25 in that bug. Thanks! -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
In reply to question #26 https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/741887 -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
In reply to question #25: everything is included in #27. Is it enough? -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Yes, thanks. -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
** Branch linked: lp:~serge-hallyn/ubuntu/maverick/qemu-kvm/slowsave ** Branch linked: lp:~serge-hallyn/ubuntu/lucid/qemu-kvm/slowsave -- 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 virtualization API: Unknown Status in QEMU: Fix Released Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
** Attachment added: amd64 .debs for lucid https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/524447/+attachment/1908989/+files/slowsave-lucid-debs.tgz -- 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 virtualization API: Unknown Status in QEMU: Fix Released Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
** Attachment added: amd64 debs for maverick https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/524447/+attachment/1909040/+files/slowsave-mav-debs.tgz ** Changed in: libvirt (Ubuntu) Status: Confirmed = Invalid ** Also affects: libvirt (Ubuntu Lucid) Importance: Undecided Status: New ** Also affects: qemu-kvm (Ubuntu Lucid) Importance: Undecided Status: New ** Also affects: libvirt (Ubuntu Maverick) Importance: Undecided Status: New ** Also affects: qemu-kvm (Ubuntu Maverick) Importance: Undecided Status: New ** Changed in: qemu-kvm (Ubuntu) Status: Confirmed = Fix Released ** Changed in: qemu-kvm (Ubuntu Lucid) Status: New = In Progress ** Changed in: qemu-kvm (Ubuntu Maverick) Status: New = In Progress -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
In order to proceed with SRU, we need someone to confirm that the debs in comment #21 or #22 work for them. ** Description changed: + == + 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. ** Tags added: verification-needed -- 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 virtualization API: Unknown 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: New Status in “qemu-kvm” source package in Lucid: In Progress Status in “libvirt” source package in Maverick: New Status in “qemu-kvm” source package in Maverick: In Progress 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Hi, please test the qemu-kvm packages in ppa:serge-hallyn/virt for lucid (0.12.3+noroms-0ubuntu10slowsave2) and maverick (0.12.5+noroms- 0ubuntu7slowsave2), which have the proposed patch from upstream. If they succeed, then I will proceed with the SRU. -- 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 virtualization API: Unknown Status in QEMU: Fix Released Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
The patch is in 0.13.0, so changing the status. ** Changed in: qemu Status: Invalid = Fix Released -- 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 virtualization API: Unknown Status in QEMU: Fix Released Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
How should I interpret Fix Released? qemu in maverick is still 0.12.5 and 0.12.3 in lucid. Will this not be fixed in current stable LTS and non-LTS releases? -- 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 virtualization API: Unknown Status in QEMU: Fix Released Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
Re: [Qemu-devel] [Bug 524447] Re: virsh save is very slow
03.01.2011 16:23, EsbenHaabendal wrote: How should I interpret Fix Released? qemu in maverick is still 0.12.5 and 0.12.3 in lucid. Not all the world is ubuntu. In qemu (and qemu-kvm) the issue is fixed in 0.13, which were released quite some time ago. Will this not be fixed in current stable LTS and non-LTS releases? There's no stable LTS and non-LTS releases in qemu, there are plain releases. /mjt
Re: [Qemu-devel] [Bug 524447] Re: virsh save is very slow
Michael Tokarev m...@tls.msk.ru writes: 03.01.2011 16:23, EsbenHaabendal wrote: How should I interpret Fix Released? qemu in maverick is still 0.12.5 and 0.12.3 in lucid. Not all the world is ubuntu. In qemu (and qemu-kvm) the issue is fixed in 0.13, which were released quite some time ago. Will this not be fixed in current stable LTS and non-LTS releases? There's no stable LTS and non-LTS releases in qemu, there are plain releases. Ok. I see. And the current importance for libvirt (Ubuntu) and qemu-kvm (Ubuntu) is marked as Wishlist. So my question goes to these two components. When can we expect to see this fixed in current Ubuntu releases, of which I currently count at least maverick and lucid. -- 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 virtualization API: Unknown Status in QEMU: Fix Released Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Will a fix for this go into maverick? This is quite critical for using kvm/libvirt for virtual server hosting on maverick. -- 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 virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Frederick, please let me know if you can confirm that this patch fixes it for you. If you need me to set up a ppa with that patch, please let me know. -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
@earl, thanks for finding the specific patch! -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Frederic, this patch: http://www.mail-archive.com/qemu-devel@nongnu.org/msg37743.html -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Iggy, which patch exactly? I don't seem to be able to find it. -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
Re: [Qemu-devel] [Bug 524447] Re: virsh save is very slow
Hi, just wanted to report, I just tried libvirt-0.8.2 which should use larger 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 -, 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. -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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. -- - 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: ser...@linuxbox.cz -
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
You may want to try the patch to qemu that avi just posted to the qemu- devel mailing list. I think this would probably fix your issue. -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
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. -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Do you have a link for the qemu-devel thread? I had a look at http://lists.gnu.org/archive/html/qemu-devel/ but couldn't see anything. -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
Re: [Qemu-devel] [Bug 524447] Re: virsh save is very slow
Bug description: 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...) Here's the Fedora bug: https://bugzilla.redhat.com/show_bug.cgi?id=599091 Note that I've already pushed a patch upstream that fixes the problem (reduces save time for a 512MB guest from 3:47 to 0:56), and eric Blake has posted a more refined patch that wastes less space by invoking dd twice (once for libvirt's header, and again for the image) - that hasn't been pushed yet, but will almost definitely supercede my patch before the libvirt-0.8.2 release.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Changing to libvirt as commentary here, and on the upstream bug report by Cole indicate a fix has been commit that improves this performance. ** Package changed: qemu-kvm (Ubuntu) = libvirt (Ubuntu) ** Also affects: libvirt via https://bugzilla.redhat.com/show_bug.cgi?id=599091 Importance: Unknown Status: Unknown -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Bug description: 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.
Re: [Qemu-devel] [Bug 524447] Re: virsh save is very slow
14.06.2010 13:37, Dave Walker wrote: Changing to libvirt as commentary here, and on the upstream bug report by Cole indicate a fix has been commit that improves this performance. Um. This is not that simple, apparently. I did some tests after this bug were discussed/mentioned last time, and see absolutely no difference between 512 and 1M dd block size. Well, there IS some difference, like several percents, but it is still very slow, and is doing nothing -- the machine is 99% idle while saving the state. Also, when using, say, gzip or lzop in place of dd (both of them perform input in units larger than 512 bytes), it is still as slow. strace shows one of kvm threads is slowly poking eventfd all the time, while others are doing right to nothing. It looks like some bad timing issue. The fact that changing block size helps sometimes - I think it's because the improvements of timing (mix-n-match), not because of real improvements. ** Package changed: qemu-kvm (Ubuntu) = libvirt (Ubuntu) In any way, the problem is definitely NOT in libvirt, since the same slowness is observed without libvirt. Thanks! /mjt
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
Re-introducing qemu-kvm, as commentary on qemu-devel mailing list suggest there could be a timing concern meaning poor performance. Leaving Libvirt on this report, as upstream libvirt have quoted improved performance adjusting the block size for dd. However, Qemu feel that the real issue is in the qemu/kvm code. Thanks. ** Also affects: qemu-kvm (Ubuntu) Importance: Undecided Status: New ** Changed in: qemu-kvm (Ubuntu) Status: New = Confirmed ** Changed in: qemu-kvm (Ubuntu) Importance: Undecided = Wishlist -- 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. Status in libvirt virtualization API: Unknown Status in QEMU: Invalid Status in “libvirt” package in Ubuntu: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
I can reproduce with: x86_64-softmmu/qemu-system-x86_64 -hda ~/images/linux.img -snapshot -m 4G -monitor stdio -enable-kvm QEMU 0.12.50 monitor - type 'help' for more information (qemu) migrate_set_speed 1G (qemu) migrate -d exec:dd of=foo.img On: commit d9b73e47a3d596c5b33802597ec5bd91ef3348e2 Author: Corentin Chary corenti...@iksaif.net Date: Tue Jun 1 23:05:44 2010 +0200 vnc: add missing target for vnc-encodings-*.o Even though the rate limit is set at 1G, we're not getting more than 1-2MB/s of migration traffic. ** Changed in: qemu Status: New = Confirmed ** Changed in: qemu Assignee: (unassigned) = Anthony Liguori (anthony-codemonkey) -- 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. Status in QEMU: Confirmed Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
This actually turns out to be related to dd's default block size. By default, dd uses a block size of 512. The effect of this is that qemu fills the pipe buffer very quickly because dd just is submitting very small requests (that will require a RMW). If you set an explict block size with dd (via bs=1M), you'll notice a significant improvement in throughput. So I think this turns out to be a libvirt issue, not a qemu issue. ** Changed in: qemu Status: Confirmed = Invalid -- 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. Status in QEMU: Invalid Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
[Qemu-devel] [Bug 524447] Re: virsh save is very slow
I filed an upstream libvirt bug for the dd block size issue: https://bugzilla.redhat.com/show_bug.cgi?id=599091 ** Bug watch added: Red Hat Bugzilla #599091 https://bugzilla.redhat.com/show_bug.cgi?id=599091 -- 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. Status in QEMU: Invalid Status in “qemu-kvm” package in Ubuntu: Confirmed Bug description: 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.
