The fio shows iops very less for CentOS6.0 vm running in kvm with backend disk SSD

Asked Jan 12 '17 at 13:17

Active Jan 12 '17 at 13:17

Viewed 507 times

Disk "iops" is very less with "fio" disk benchmark tool for CentOS 6.0 virtual machine running on KVM. When I execute same on CentOS 6.7 and CentOS 7.2, the iops is as expected. The back end disk is SSD and the command I executed is below.

fio --name=randwrite --randrepeat=1 --direct=1 --gtod_reduce=1 --rw=randwrite --size=4g --iodepth=64 --ioengine=libaio --output=fio_op1.txt.

I have installed virtio module as guided by the below kb. https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/6/html/Virtualization_Host_Configuration_and_Guest_Installation_Guide/ch10s04.html

The #lsmod | grep -i virtio* shows all the modules also.

iops for CentOS6.0 iops for CentOS6.7 iops for CentOS7.2

edited Jun 11 '20 at 10:02

Community

asked Jan 12 '17 at 13:17

Paul Jany Godwin

1

Why would you be using CentOS 6.0 anymore when you have newer versions available? – ewwhite Jan 12 '17 at 14:12
CentOS 6.0 is the one customer used in previous infrastructure and he is particular that he needs same CentOS6.0. – Paul Jany Godwin Jan 13 '17 at 00:32
The very FIRST thing you need to do is to find out why he is insisting on this, and then deal with that, because quite frankly it's insane. – Michael Hampton Jan 13 '17 at 18:21

The fio shows iops very less for CentOS6.0 vm running in kvm with backend disk SSD

fio --name=randwrite --randrepeat=1 --direct=1 --gtod_reduce=1 --rw=randwrite --size=4g --iodepth=64 --ioengine=libaio --output=fio_op1.txt.

0 Answers0