[Bugs] [Bug 1365459] New: [Perf] : Poor smallfile performance on Ganesha v4 mounts

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1365459

            Bug ID: 1365459
           Summary: [Perf] : Poor smallfile performance on Ganesha v4
                    mounts
           Product: GlusterFS
           Version: 3.8.1
         Component: ganesha-nfs
          Severity: high
          Assignee: bugs at gluster.org
          Reporter: asoman at redhat.com
                CC: bugs at gluster.org



Created attachment 1189209
  --> https://bugzilla.redhat.com/attachment.cgi?id=1189209&action=edit
Server Profiles

Description of problem:
-----------------------

Smallfile creates,reads,renames etc are slow on Ganesha v4 mounts :

*On Ganesha v4* :

Creates : 466 files/sec
Reads : 639 files/sec
Renames : 160 files/sec
Rmdir  : 726 files/sec

Under the same workload,this is what I am seeing on Gluster NFS :

Creates : 880 files/sec
Reads : 2512 files/sec
Renames : 367 files/sec
Rmdir : 1017 files/sec

Both these results are with "Smallfile Perf enhancements" -
cluster.lookup-optimize is on and server.event-threads and client.event-threads
are 4 each.

Version-Release number of selected component (if applicable):
-------------------------------------------------------------


glusterfs-server-3.8.1-0.4.git56fcf39.el7rhgs.x86_64
nfs-ganesha-gluster-2.4-0.dev.26.el7rhgs.x86_64
pacemaker-libs-1.1.13-10.el7.x86_64
pcs-0.9.143-15.el7.x86_64


How reproducible:
----------------

100%

Steps to Reproduce:
-------------------
My setup consists of 4 servers and 4 clients.Each client mounts from 1 server.

Run smallfile workload in a distributed-multithreaded way:

python /small-files/smallfile/smallfile_cli.py --operation create --threads 8 
--file-size 64 --files 10000 --top /gluster-mount --host-set "`echo $CLIENT |
tr ' ' ','`"

python /small-files/smallfile/smallfile_cli.py --operation read --threads 8 
--file-size 64 --files 10000 --top /gluster-mount --host-set "`echo $CLIENT |
tr ' ' ','`"

etc.


Actual results:
---------------

Smallfile performance is slow

Expected results:
-----------------

Additional info:
----------------
Volume Name: testvol
Type: Distributed-Replicate
Volume ID: 3ee2c046-939b-4915-908b-859bfcad0840
Status: Started
Number of Bricks: 2 x 2 = 4
Transport-type: tcp
Bricks:
Brick1: gqas001.sbu.lab.eng.bos.redhat.com:/bricks/testvol_brick0
Brick2: gqas014.sbu.lab.eng.bos.redhat.com:/bricks/testvol_brick1
Brick3: gqas015.sbu.lab.eng.bos.redhat.com:/bricks/testvol_brick2
Brick4: gqas016.sbu.lab.eng.bos.redhat.com:/bricks/testvol_brick3
Options Reconfigured:
client.event-threads: 4
server.event-threads: 4
cluster.lookup-optimize: on
ganesha.enable: on
features.cache-invalidation: on
nfs.disable: on
performance.readdir-ahead: on
performance.stat-prefetch: off
server.allow-insecure: on
nfs-ganesha: enable
cluster.enable-shared-storage: enable

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