Hi Amar, I would like to test Cluster v6 , but as I'm quite new to oVirt - I'm not sure if oVirt <-> Gluster will communicate properly Did anyone test rollback from v6 to v5.5 ? If rollback is possible - I would be happy to give it a try. Best Regards, Strahil NikolovOn Apr 3, 2019 11:35, Amar Tumballi Suryanarayan <atumball@redhat.com> wrote:

Strahil,

With some basic testing, we are noticing the similar behavior too.

One of the issue we identified was increased n/w usage in 5.x series (being addressed by https://review.gluster.org/#/c/glusterfs/+/22404/), and there are few other features which write extended attributes which caused some delay.

We are in the process of publishing some numbers with release-3.12.x, release-5 and release-6 comparison soon. With some numbers we are already seeing release-6 currently is giving really good performance in many configurations, specially for 1x3 replicate volume type.

While we continue to identify and fix issues in 5.x series, one of the request is to validate release-6.x (6.0 or 6.1 which would happen on April 10th), so you can see the difference in your workload.

Regards, Amar

On Wed, Apr 3, 2019 at 5:57 AM Strahil Nikolov <hunter86_bg@yahoo.com> wrote:

...

Hi Community,

I have the feeling that with gluster v5.5 I have poorer performance than it used to be on 3.12.15. Did you observe something like that?

I have a 3 node Hyperconverged Cluster (ovirt + glusterfs with replica 3 arbiter1 volumes) with NFS Ganesha and since I have upgraded to v5 - the issues came up. First it was 5.3 notorious experience and now with 5.5 - my sanlock is having problems and higher latency than it used to be. I have switched from NFS-Ganesha to pure FUSE , but the latency problems do not go away.

Of course , this is partially due to the consumer hardware, but as the hardware has not changed I was hoping that the performance will remain as is.

So, do you expect 5.5 to perform less than 3.12 ?

Some info: Volume Name: engine Type: Replicate Volume ID: 30ca1cc2-f2f7-4749-9e2e-cee9d7099ded Status: Started Snapshot Count: 0 Number of Bricks: 1 x (2 + 1) = 3 Transport-type: tcp Bricks: Brick1: ovirt1:/gluster_bricks/engine/engine Brick2: ovirt2:/gluster_bricks/engine/engine Brick3: ovirt3:/gluster_bricks/engine/engine (arbiter) Options Reconfigured: performance.client-io-threads: off nfs.disable: on transport.address-family: inet performance.quick-read: off performance.read-ahead: off performance.io-cache: off performance.low-prio-threads: 32 network.remote-dio: off cluster.eager-lock: enable cluster.quorum-type: auto cluster.server-quorum-type: server cluster.data-self-heal-algorithm: full cluster.locking-scheme: granular cluster.shd-max-threads: 8 cluster.shd-wait-qlength: 10000 features.shard: on user.cifs: off storage.owner-uid: 36 storage.owner-gid: 36 network.ping-timeout: 30 performance.strict-o-direct: on cluster.granular-entry-heal: enable cluster.enable-shared-storage: enable

Network: 1 gbit/s

Filesystem:XFS

Best Regards, Strahil Nikolov

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