[Gluster-users] Lower IO performance with 3.7.x than with 3.5.x

[Geoffrey Letessier]

Hi,

Previously we used GlusterFS v3.5.3 and we could achieve around 1.1GBs for read/write in plain distributed volume. 
Now, since I have upgraded GlusterFS to 3.7.3, i can only achieve around 700MBs (max).

Here some additional information concerning my volume. 

# gluster volume info vol_workdir_amd
 
Volume Name: vol_workdir_amd
Type: Distribute
Volume ID: 42d8f9fa-3b24-414f-a275-dadcfdd8d3db
Status: Started
Number of Bricks: 4
Transport-type: tcp,rdma
Bricks:
Brick1: ib-storage1:/export/brick_workdir/brick1/data
Brick2: ib-storage3:/export/brick_workdir/brick1/data
Brick3: ib-storage1:/export/brick_workdir/brick2/data
Brick4: ib-storage3:/export/brick_workdir/brick2/data
Options Reconfigured:
client.event-threads: 4
performance.readdir-ahead: on
auth.allow: 10.0.*
cluster.min-free-disk: 5%
performance.cache-size: 1GB
performance.io-thread-count: 32
diagnostics.brick-log-level: CRITICAL
nfs.disable: on
performance.read-ahead: on


and the status is OK for all bricks in.

Thanks in advance,
Geoffrey
------------------------------------------------------
Geoffrey Letessier
Responsable informatique & ingénieur système
UPR 9080 - CNRS - Laboratoire de Biochimie Théorique
Institut de Biologie Physico-Chimique
13, rue Pierre et Marie Curie - 75005 Paris
Tel: 01 58 41 50 93 - eMail: geoffrey.letessier at ibpc.fr

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