Re: Glusterfs performance regression with quota enabled

[Xie Changlong<zgrep@xxxxxxx>]

Hi changwei, i'm sure if you enable quota, the performance will sharply drop. There is a issue to implement glusterfs project quota just like xfs  project quota,  but no progress for a long time.

Pls ref: https://github.com/gluster/glusterfs/issues/184

 

发件人: Changwei Ge

时间: 2019/08/16(星期五)17:09

收件人: gluster-devel;

主题: [Gluster-devel] Glusterfs performance regression with quota enabled

Hi,

I am using glusterfs-5.6 with quota enabled. I observed a obvious 
performance regression about 30% against a certain vdbench workload[1].

But I didn't set up a hard-limit or soft-limit to any particular volume 
or directory yet, just enable quota.

After disabling features/quota, glusterfs performance went normal.


Is it normal that qutoa will make the performance sharply drop?


Thanks,

Changwei


[1]:

messagescan=no

fsd=fsd1,anchor=/mnt/q8,depth=1,width=1,files=50000,size=(32k,20,64k,30,128k,30,256k,20)

fwd=fwd1,fsd=fsd1,operation=read,rdpct=80,xfersize=8k,fileio=random,fileselect=random,threads=8

rd=rd1,fwd=fwd1,fwdrate=max,format=yes,elapsed=100,interval=1

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