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Diffstat (limited to 'results/classifier/deepseek-2-tmp/output/KVM/741887')
| -rw-r--r-- | results/classifier/deepseek-2-tmp/output/KVM/741887 | 80 |
1 files changed, 0 insertions, 80 deletions
diff --git a/results/classifier/deepseek-2-tmp/output/KVM/741887 b/results/classifier/deepseek-2-tmp/output/KVM/741887 deleted file mode 100644 index 964768b99..000000000 --- a/results/classifier/deepseek-2-tmp/output/KVM/741887 +++ /dev/null @@ -1,80 +0,0 @@ - -virsh snapshot-create too slow (kvm, qcow2, savevm) - -Action -====== -# time virsh snapshot-create 1 - -* Taking snapshot of a running KVM virtual machine - -Result -====== -Domain snapshot 1300983161 created -real 4m46.994s -user 0m0.000s -sys 0m0.010s - -Expected result -=============== -* Snapshot taken after few seconds instead of minutes. - -Environment -=========== -* Ubuntu Natty Narwhal upgraded from Lucid and Meerkat, fully updated. - -* Stock natty packages of libvirt and qemu installed (libvirt-bin 0.8.8-1ubuntu5; libvirt0 0.8.8-1ubuntu5; qemu-common 0.14.0+noroms-0ubuntu3; qemu-kvm 0.14.0+noroms-0ubuntu3). - -* Virtual machine disk format is qcow2 (debian 5 installed) -image: /storage/debian.qcow2 -file format: qcow2 -virtual size: 10G (10737418240 bytes) -disk size: 1.2G -cluster_size: 65536 -Snapshot list: -ID TAG VM SIZE DATE VM CLOCK -1 snap01 48M 2011-03-24 09:46:33 00:00:58.899 -2 1300979368 58M 2011-03-24 11:09:28 00:01:03.589 -3 1300983161 57M 2011-03-24 12:12:41 00:00:51.905 - -* qcow2 disk is stored on ext4 filesystem, without RAID or LVM or any special setup. - -* running guest VM takes about 40M RAM from inside, from outside 576M are given to that machine - -* host has fast dual-core pentium cpu with virtualization support, around 8G of RAM and 7200rpm harddrive (dd from urandom to file gives about 20M/s) - -* running processes: sshd, atd (empty), crond (empty), libvirtd, tmux, bash, rsyslogd, upstart-socket-bridge, udevd, dnsmasq, iotop (python) - -* networking is done by bridging and bonding - - -Detail description -================== - -* Under root, command 'virsh create-snapshot 1' is issued on booted and running KVM machine with debian inside. - -* After about four minutes, the process is done. - -* 'iotop' shows two 'kvm' processes reading/writing to disk. First one has IO around 1500 K/s, second one has around 400 K/s. That takes about three minutes. Then first process grabs about 3 M/s of IO and suddenly dissapears (1-2 sec). Then second process does about 7.5 M/s of IO for around a 1-2 minutes. - -* Snapshot is successfuly created and is usable for reverting or extracting. - -* Pretty much the same behaviour occurs when command 'savevm' is issued directly from qemu monitor, without using libvirf44bfb7fb978c9313ce050a1c4149bf04aa0a670t at all (actually, virsh snapshot-create just calls 'savevm' to the monitor socket). - -* This behaviour was observed on lucid, meerkat, natty and even with git version of libvirt (f44bfb7fb978c9313ce050a1c4149bf04aa0a670). Also slowsave packages from https://bugs.launchpad.net/ubuntu/+source/libvirt/+bug/524447 gave this issue. - - -Thank you for helping to solve this issue! - -ProblemType: Bug -DistroRelease: Ubuntu 11.04 -Package: libvirt-bin 0.8.8-1ubuntu5 -ProcVersionSignature: Ubuntu 2.6.38-7.38-server 2.6.38 -Uname: Linux 2.6.38-7-server x86_64 -Architecture: amd64 -Date: Thu Mar 24 12:19:41 2011 -InstallationMedia: Ubuntu-Server 10.04.2 LTS "Lucid Lynx" - Release amd64 (20110211.1) -ProcEnviron: - LANG=en_US.UTF-8 - SHELL=/bin/bash -SourcePackage: libvirt -UpgradeStatus: No upgrade log present (probably fresh install) \ No newline at end of file |