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Thread: vzdump performace problems

  1. #1
    Join Date
    May 2012
    Posts
    3

    Default vzdump performace problems

    Hi All,

    I have upgraded proxmox 1.9 to 2.0, and it's working, but I have a problem with vzdump.

    In 1.9 my daily backup log was:


    vzdump --quiet --snapshot --compress --storage backup_sunday --maxfiles 1 --mailto xxx@xxx.xx --all 101: Apr 22 02:00:01 INFO: Starting Backup of VM 101 (qemu) 101: Apr 22 02:00:01 INFO: running 101: Apr 22 02:00:01 INFO: status = running 101: Apr 22 02:00:02 INFO: backup mode: snapshot 101: Apr 22 02:00:02 INFO: ionice priority: 7 101: Apr 22 02:00:02 INFO: Logical volume "vzsnap-virt-0" created 101: Apr 22 02:00:02 INFO: creating archive '/backup/sunday/vzdump-qemu-101-2012_04_22-02_00_01.tgz' 101: Apr 22 02:00:02 INFO: adding '/backup/sunday/vzdump-qemu-101-2012_04_22-02_00_01.tmp/qemu-server.conf' to archive ('qemu-server.conf') 101: Apr 22 02:00:02 INFO: adding '/mnt/vzsnap0/images/101/vm-101-disk-1.raw' to archive ('vm-disk-ide0.raw') 101: Apr 22 02:37:04 INFO: Total bytes written: 3398740480 (1.46 MiB/s) 101: Apr 22 02:37:04 INFO: archive file size: 1.34GB 101: Apr 22 02:37:04 INFO: delete old backup '/backup/sunday/vzdump-qemu-101-2012_04_15-02_00_01.tgz' 101: Apr 22 02:37:06 INFO: Logical volume "vzsnap-virt-0" successfully removed 101: Apr 22 02:37:06 INFO: Finished Backup of VM 101 (00:37:05)
    After I have upgraded to 2.0 my log is:


    vzdump --quiet 1 --mailto xxx@xxx.xx --mode snapshot --compress gzip --storage backup_tue --all 1 101: Apr 24 00:00:02 INFO: Starting Backup of VM 101 (qemu) 101: Apr 24 00:00:02 INFO: status = running 101: Apr 24 00:00:03 INFO: backup mode: snapshot 101: Apr 24 00:00:03 INFO: ionice priority: 7 101: Apr 24 00:00:03 INFO: Logical volume "vzsnap-virt-0" created 101: Apr 24 00:00:03 INFO: creating archive '/backup/tue/dump/vzdump-qemu-101-2012_04_24-00_00_02.tar.gz' 101: Apr 24 00:00:03 INFO: adding '/backup/tue/dump/vzdump-qemu-101-2012_04_24-00_00_02.tmp/qemu-server.conf' to archive ('qemu-server.conf') 101: Apr 24 00:00:03 INFO: adding '/mnt/vzsnap0/images/101/vm-101-disk-1.raw' to archive ('vm-disk-ide0.raw') 101: Apr 24 03:17:09 INFO: Total bytes written: 429496732160 (34.64 MiB/s) 101: Apr 24 03:17:09 INFO: archive file size: 13.65GB 101: Apr 24 03:17:11 INFO: Finished Backup of VM 101 (03:17:09)


    So there is a big difference between (1.46 MiB/s)and (34.64 MiB/s). and "archive file size: 13.65GB" and "archive file size: 1.34GB"

    I don't have any idea what can I do and what I did wrong.

    There are not any modification on KVM, or any hardware change my machine. What can I do?

    The restore time of this KVM approx. 10 hours

    Please help me!

    Thx,
    rekacsa

  2. #2
    Join Date
    Apr 2005
    Location
    Austria
    Posts
    12,108

    Default Re: vzdump performace problems

    Try to use 'lzo' instead of 'gzip'

  3. #3
    Join Date
    May 2012
    Posts
    3

    Default Re: vzdump performace problems

    ok, I will try it.

  4. #4
    Join Date
    May 2012
    Posts
    3

    Default Re: vzdump performace problems

    I's much better now, Thx!


    vzdump --quiet 1 --mailto xxx@xxx.xx --mode snapshot --compress lzo --storage backup_thue --all 1 101: May 03 00:00:01 INFO: Starting Backup of VM 101 (qemu) 101: May 03 00:00:01 INFO: status = running 101: May 03 00:00:02 INFO: backup mode: snapshot 101: May 03 00:00:02 INFO: ionice priority: 7 101: May 03 00:00:03 INFO: Logical volume "vzsnap-virt-0" created 101: May 03 00:00:03 INFO: creating archive '/backup/thue/dump/vzdump-qemu-101-2012_05_03-00_00_01.tar.lzo' 101: May 03 00:00:03 INFO: adding '/backup/csutortok/dump/vzdump-qemu-101-2012_05_03-00_00_01.tmp/qemu-server.conf' to archive ('qemu-server.conf') 101: May 03 00:00:03 INFO: adding '/mnt/vzsnap0/images/101/vm-101-disk-1.raw' to archive ('vm-disk-ide0.raw') 101: May 03 00:48:01 INFO: Total bytes written: 429496732160 (142.32 MiB/s) 101: May 03 00:48:01 INFO: archive file size: 3.32GB 101: May 03 00:48:01 INFO: delete old backup '/backup/thue/dump/vzdump-qemu-101-2012_04_26-00_00_01.tar.gz' 101: May 03 00:48:23 INFO: Finished Backup of VM 101 (00:48:22)

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