[Gluster-devel] 3.7.8 client is slow

[David Robinson]

The 3.7.8 FUSE client is significantly slower than 3.7.6.  Is this 
related to some of the fixes that were done to correct memory leaks?  Is 
there anything that I can do to recover the performance of 3.7.6?

My testing involved creating a "bigfile" that is 20GB.  I then installed 
the 3.6.6 FUSE client and tested the copy of the bigfile from one 
gluster machine to another.  The test was repeated 2x to make sure cache 
wasn't affect performance.

Using Centos7.1
FUSE 3.6.6 took 47-seconds and 38-seconds.
FUSE 3.7.6 took 43-seconds and 34-seconds.
FUSE 3.7.8 took 205-seconds and 224-seconds

I repeated the test on another machine that is running centos 6.7 and 
the results were even worse.  98-seconds for FUSE 3.6.6 versus 
575-seconds for FUSE 3.7.8.

My server setup is:

Volume Name: gfsbackup
Type: Distribute
Volume ID: 29b8fae9-dfbf-4fa4-9837-8059a310669a
Status: Started
Number of Bricks: 2
Transport-type: tcp
Bricks:
Brick1: ffib01bkp:/data/brick01/gfsbackup
Brick2: ffib01bkp:/data/brick02/gfsbackup
Options Reconfigured:
performance.readdir-ahead: on
cluster.rebal-throttle: aggressive
diagnostics.client-log-level: WARNING
diagnostics.brick-log-level: WARNING
changelog.changelog: off
client.event-threads: 8
server.event-threads: 8

David



========================



David F. Robinson, Ph.D.

President - Corvid Technologies

145 Overhill Drive

Mooresville, NC 28117

704.799.6944 x101   [Office]

704.252.1310           [Cell]

704.799.7974           [Fax]

david.robinson at corvidtec.com

http://www.corvidtec.com

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