All,
We've been evaluating glusterfs 3.2.7 on ubuntu 14.04 LTS. All
tests were run with event-thread matching cpu-cores and
lookup-unhashed turned off
We noted a couple of issues and some interesting results
which might be of benefit to the developers
Setup
- bare metal machine with SSD running ZFS - 2 LXC container
running glusterd and another running a samba instance which is
serving a share backed by a fuse mounted volume.
Observations
1 ) the fuse mounted volume has to be done in the host and
LXC run on top of it. If you try to fuse mount within in LXC -
posix acls group persmissions are not respected completed by
gluster
2) small file performance - tests were run unzipping from a
windows box a 45M and 150M (expanded size - contains 8000
files) archive. 45M performance is reasonable. 150M tests
takes 10 times as long(about 18 minutes) as the same samba
instance serving of a straight zfs filesystem
3) As a whim we logged into the container containing the
samba instance and copied files from the ZFS folder to the
folder under gluster. 14seconds for the same transfer of 8000
files!!
We don't know if there is a mismatch in the config of samba
that is causing issues with gluster. Any ideas? And also is
the issue with posix acls groups being broken if you
fuse_mount a gluster volume within LXC known?
Finally, are there any gluster developers in the UK - we
would love to talk to them.
Thanks,
Hafeez
