Native ZFS for Linux

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Bug #1567557
Comment #8

Comment 8 for bug 1567557

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Colin Ian King (colin-king) wrote on 2017-07-05: Re: Performance degradation of "zfs clone" when under load

lxd-zfs-btrfs-comparisons.ods Edit (154.3 KiB, application/vnd.oasis.opendocument.spreadsheet)

I've now compared ZFS with BTRFS and the overall CPU load profile from lxd in both scenarios is surprisingly similar - lxd is eating a lot of CPU and I think there is an underlying issue there rather than a massively broken performance issue with ZFS.

See the attached data sheet; the CPU consumption graphs for lxd in both scenarios show that lxd's CPU consumption increases with the number of container instances and this seems to be causing throttling of the ZFS backing store. Why is lxd eating so much CPU?