[lxc-users] zfs disk usage for published lxd images

[Ron Kelley]

I tried ZFS on various linux/FreeBSD builds in the past and the 
performance was aweful.  It simply required too much RAM to perform 
properly.  This is why I went the BTRFS route.

Maybe I should look at ZFS again on Ubuntu 16.04...



On 5/16/2016 6:59 AM, Fajar A. Nugraha wrote:
> On Mon, May 16, 2016 at 5:38 PM, Ron Kelley <rkelleyrtp at gmail.com> wrote:
>> For what's worth, I use BTRFS, and it works great.
>
> Btrfs also works in nested lxd, so if that's your primary use I highly
> recommend btrfs.
>
> Of course, you could also keep using zfs-backed containers, but
> manually assign a zvol-formatted-as-btrfs for first-level-container's
> /var/lib/lxd.
>
>>  Container copies are almost instant.  I can use compression with minimal overhead,
>
> zfs and btrfs are almost identical in that aspect (snapshot/clone, and
> lz4 vs lzop in compression time and ratio). However, lz4 (used in zfs)
> is MUCH faster at decompression compared to lzop (used in btrfs),
> while lzop uses less memory.
>
>> use quotas to limit container disk space,
>
> zfs does that too
>
>> and can schedule a deduplication task via cron to save even more space.
>
> That is, indeed, only available in btrfs
>