Bug 1382092

Summary: [Perf] : Poor metadata performance on Ganesha v4 mounts compared to Gluster NFS
Product: Red Hat Gluster Storage Reporter: Ambarish <asoman>
Component: nfs-ganeshaAssignee: Girjesh Rajoria <grajoria>
Status: CLOSED NEXTRELEASE QA Contact: Rahul Hinduja <rhinduja>
Severity: high Docs Contact:
Priority: high    
Version: rhgs-3.2CC: amukherj, ffilz, jthottan, kkeithle, pasik, rcyriac, rhinduja, rhs-bugs, sanandpa, skoduri, storage-qa-internal
Target Milestone: ---Keywords: Performance, Triaged, ZStream
Target Release: ---   
Hardware: x86_64   
OS: Linux   
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Last Closed: 2019-10-15 07:39:20 UTC Type: Bug
Regression: --- Mount Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description Ambarish 2016-10-05 17:30:45 UTC 
Description of problem:
-----------------------

**The intent of opening this BZ is to compare metadata performance on gNFS and Ganesha v4 mounts,and to reduce the magnitude of difference between the two. **

Metadata performance is comparatively slower on Ganesha v4 mounts than gNFS,under the exact same workload and environment.

Details in comments.

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

nfs-ganesha-2.4.0-2.el7rhgs.x86_64
glusterfs-ganesha-3.8.4-2.el7rhgs.x86_64

How reproducible:
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100%

Steps to Reproduce:
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Run smallfile in a distributed multithreaded way from 1/4 clients : 

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

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

There is a difference in IOPS (almost 40% in some cases) between gNFS and Ganesha v4 under the same workload. 

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

The difference between the two should be not be as pronounced as is being seen atm.

Additional info:
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Vol Type  : 2*2,Dist Rep
Client and Server OS : RHEL 7

Server Profiles will be updated once https://bugzilla.redhat.com/show_bug.cgi?id=1381353 is fixed.
Comment 7 surabhi 2016-11-29 10:05:40 UTC 
As per the triaging we all have the agreement that this BZ has to be fixed in rhgs-3.2.0. Providing qa_ack