Public bug reported:
`lxd init` does not currently set any options for ZFS. It really should
set compression=lz4.
LZ4 compression is so fast that it is almost always a win. The general
upstream ZFS guidance is that unless you are sure most/all of your data
is uncompressible, you should always enable lz4 compression. The *only*
reason that the default in ZFS is still compression=off is for backwards
compatibility.
Unless LXC/LXD require atime updates, you should also set atime=off.
This is the same as "noatime", and like that option, avoids turning
reads into writes.
Basically, replace this:
zfs create POOLNAME/containers
zfs create POOLNAME/images
with this:
zfs create -o compression=lz4 -o atime=off POOLNAME/containers
zfs create -o compression=lz4 -o atime=off POOLNAME/images
Alternatively, you could set it at the pool level, but setting it at
your "containers" & "images" level means you use the same codepath for a
dedicated pool as for using an existing pool.
** Affects: lxd (Ubuntu)
Importance: Undecided
Status: New
** Description changed:
`lxd init` does not currently set any options for ZFS. It really should
set compression=lz4.
LZ4 compression is so fast that it is almost always a win. The general
upstream ZFS guidance is that unless you are sure most/all of your data
is uncompressible, you should always enable lz4 compression. The *only*
reason that the default in ZFS is still compression=off is for backwards
compatibility.
Unless LXC/LXD require atime updates, you should also set atime=off.
This is the same as "noatime", and like that option, avoids turning
reads into writes.
Basically, replace this:
zfs create POOLNAME/containers
+ zfs create POOLNAME/images
with this:
zfs create -o compression=lz4 -o atime=off POOLNAME/containers
+ zfs create -o compression=lz4 -o atime=off POOLNAME/images
Alternatively, you could set it at the pool level, but setting it at
- your "containers" level means you use the same codepath for a dedicated
- pool as for using an existing pool.
+ your "containers" & "images" level means you use the same codepath for a
+ dedicated pool as for using an existing pool.
--
You received this bug notification because you are a member of Ubuntu
Bugs, which is subscribed to Ubuntu.
https://bugs.launchpad.net/bugs/1629118
Title:
lxd init should set compression=lz4 on ZFS
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/lxd/+bug/1629118/+subscriptions
--
ubuntu-bugs mailing list
[email protected]
https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
