[Gluster-devel] Glusterfs performance regression with quota enabled

[Changwei Ge]

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