[Gluster-users] Performance drop when upgrading from 3.8 to 6.5

[Riccardo Murri]

Hello Strahil

> What options do you use i  your cluster?

I'm not sure what exact info you would like to see?

Here's how clients mount the GlusterFS volume:
```
$ fgrep gluster /proc/mounts
tp-glusterfs5:/glusterfs /net/glusterfs fuse.glusterfs
rw,nosuid,nodev,relatime,user_id=0,group_id=0,default_permissions,allow_other,max_read=131072
0 0
```

Here's some server-side info:

```
$ sudo gluster volume info glusterfs

Volume Name: glusterfs
Type: Distribute
Volume ID: a3358ff6-5cec-4a65-9ecf-a63bbe56dfd9
Status: Started
Snapshot Count: 0
Number of Bricks: 5
Transport-type: tcp
Bricks:
Brick1: pelkmanslab-tp-glusterfs5:/srv/glusterfs
Brick2: pelkmanslab-tp-glusterfs4:/srv/glusterfs
Brick3: pelkmanslab-tp-glusterfs3:/srv/glusterfs
Brick4: pelkmanslab-tp-glusterfs1:/srv/glusterfs
Brick5: pelkmanslab-tp-glusterfs2:/srv/glusterfs
Options Reconfigured:
diagnostics.client-log-level: WARNING
diagnostics.brick-log-level: INFO
features.uss: disable
features.barrier: disable
performance.client-io-threads: on
transport.address-family: inet
nfs.disable: on
snap-activate-on-create: enable

$ sudo gluster volume get all all
Option                                  Value
------                                  -----
cluster.server-quorum-ratio             51
cluster.enable-shared-storage           disable
cluster.op-version                      60000
cluster.max-op-version                  60000
cluster.brick-multiplex                 disable
cluster.max-bricks-per-process          250
cluster.localtime-logging               disable
cluster.daemon-log-level                INFO

$ cat /etc/glusterfs/glusterd.vol
volume management
    type mgmt/glusterd
    option working-directory /var/lib/glusterd
    option transport-type socket,rdma
    option transport.socket.keepalive-time 10
    option transport.socket.keepalive-interval 2
    option transport.socket.read-fail-log off
    option transport.socket.listen-port 24007
    option transport.rdma.listen-port 24008
    option ping-timeout 0
    option event-threads 1
#   option lock-timer 180
#   option transport.address-family inet6
#   option base-port 49152
    option max-port  60999
end-volume
```

Both server and clients are running v6.5 and op-version is 60000 everywhere.

Thanks,
Riccardo