Native ZFS for Linux on OpenStack



Jules is the owner and author of ISPIRE.ME. He's a Linux System Engineer, Tech fanatic and an Open Source fan.

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6 Responses

  1. Paul Paul says:

    Yeah, this guide was awesome.

  2. Christof Ameye Christof Ameye says:

    If you want to snapshot your VM disks with ZFS snapshots, then enabling the second write back mechanism (zfs sync disable is fine) is a bad idea:

    1. zfs set sync=disabled storage
    2. driver name=’qemu’ type=’raw’ cache=’writeback’

    in fact on kvm level you should not used cache=writeback because it is useless if zfs is already caching with the first line, and secondly when making snapshots in zfs your disk snapshots on zfs level will not be consistent at all. Solution: omit the cache=’writeback’ and the system will be as fast (or faster, because no double buffering), but still consistent!

  3. Kash Kash says:

    Hi – never set checksum=off because this neuters ZFS’ ability to correct data corruption, which is one of the best features of ZFS.

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