[Gluster-devel] Small File Performance - Strange results

Joe Julian joe at julianfamily.org
Tue Aug 4 21:34:49 UTC 2015

3.2.7 is far beyond its supported lifetime. Please upgrade. The official 
PPAs can be found at https://launchpad.net/~gluster

On 08/04/2015 09:55 AM, Hafeez Bana wrote:
> 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
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> Gluster-devel at gluster.org
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