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Bug 1365463 - [Perf] : Poor metadata performance on Ganesha v4 mounts
Summary: [Perf] : Poor metadata performance on Ganesha v4 mounts
Alias: None
Product: GlusterFS
Classification: Community
Component: ganesha-nfs
Version: 3.8
Hardware: x86_64
OS: Linux
Target Milestone: ---
Assignee: Soumya Koduri
QA Contact: Ambarish
Depends On:
TreeView+ depends on / blocked
Reported: 2016-08-09 10:50 UTC by Ambarish
Modified: 2017-11-07 10:40 UTC (History)
7 users (show)

Fixed In Version:
Doc Type: If docs needed, set a value
Doc Text:
Clone Of:
Last Closed: 2017-11-07 10:40:08 UTC
Regression: ---
Mount Type: ---
Documentation: ---
Verified Versions:

Attachments (Terms of Use)

Description Ambarish 2016-08-09 10:50:30 UTC
Description of problem:

Metadata performance on Ganesha v4 mounts is  poor when compared to GlusterNFS :

*On Ganesha v4 mounts* :

stat : 959 files/sec
chmod : 820 files/sec
setxattr : 1318 files/sec
getxattr : 334 files/sec

*On Gluster NFS* :

stat : 1596 files/sec
chmod : 1477 files/sec
setxattr : 1750 files/sec
getxattr : 1535 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):


How reproducible:


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 on  Ganehsa v4 and Gluster NFS mounts :

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

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


Actual results:

Metadata perf is comparitively poor.

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
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

Comment 2 Ambarish 2016-08-09 11:50:41 UTC
I see a problem on smallfile renames on Ganesha v3 as well :

On Ganesha v3 mounts : 156 files/sec
On GlusterNFS : 367 files/sec

The rest of the stuff looked comparable.

Comment 3 Ambarish 2016-08-09 16:44:32 UTC
Igonre comment#2,it was for BZ#1365459.

What I meant to say was there's a problem with smallfile listing on v3 mounts.

On Ganesha v3 mounts : 940 files/sec
On GlusterNFS : 1703 files/sec

There's a downstream bug for the same :

Comment 5 Niels de Vos 2016-09-12 05:39:43 UTC
All 3.8.x bugs are now reported against version 3.8 (without .x). For more information, see

Comment 6 Niels de Vos 2017-11-07 10:40:08 UTC
This bug is getting closed because the 3.8 version is marked End-Of-Life. There will be no further updates to this version. Please open a new bug against a version that still receives bugfixes if you are still facing this issue in a more current release.

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