Description of problem:
When running IOZone in distributed mode I am seeing an ~20% performance drop between the glusterfs-22.214.171.124-1.el6rhs.x86_64 and glusterfs-126.96.36.199-1.el6rhs.x86_64 builds.
RHS 2.1u2 146,064.29 KB/sec
188.8.131.52 141,667.77 KB/sec
184.108.40.206 111,617.25 KB/sec
Version-Release number of selected component (if applicable):
I have hit this every time I ran IOZone performance regression tests(5 runs in a row)
Steps to Reproduce:
1. Setup 2x2 BAGL cluster with 4 10G clients
2. Run IOZone:
iozone -+m /mnt/tests/rhs-tests/beaker/rhs/auto-tests/setup/rhs-setup/clients.ioz -+h gqac006.sbu.lab.eng.bos.redhat.com -C -w -c -e -i 2 -J 3 -+n -r 64k -s 2g -t 16
I am seeing a greater than 20% performance regression between builds .24 and .25.
Performance in line with earlier builds / RHS 2.1u2
I am working on this. I have checked the patches that have gone into version 25,
none of them seem to have caused this.
I will run the tests on my setup once and check. Also, will check the profile data. Will update soon with findings.
Closing as not a bug.