Guest os have iops lower than Host OS

hass

New Member
Dec 6, 2018
2
0
1
33
Hi all,
im pretty new on proxmox VE, and finding a sotrage solution for performance and stabiility.
I surprised about IOPS of VMs on proxmox always lower than IOPS of NVME SSD specification.

Hardware as bellow:
- 2 sata SSD installed Promox VE 5.2 and set raid 1 for them using hard raid
- 6 NVME SSD grouped an raid 10 array using software raid of ZFS.

And results as bellow:
- the result on CENTOS-VM of read and write random for ZFS array raid 10
upload_2018-12-10_16-50-39.png

- Another result on HOST of Read and write random for single disk non raid:
upload_2018-12-10_17-0-18.png

i also test with many file system (xfs, ext4, zfs ) and raid level ( raid 0, raid1, raid10) but IOPS of Guest always lower and lower than HOST.
kindly advise me this case.
 

Attachments

  • upload_2018-12-10_16-50-15.jpeg
    upload_2018-12-10_16-50-15.jpeg
    34.7 KB · Views: 3
  • upload_2018-12-10_16-50-15.png
    upload_2018-12-10_16-50-15.png
    593.6 KB · Views: 3
  • upload_2018-12-10_16-50-39.jpeg
    upload_2018-12-10_16-50-39.jpeg
    34.7 KB · Views: 3

About

The Proxmox community has been around for many years and offers help and support for Proxmox VE, Proxmox Backup Server, and Proxmox Mail Gateway.
We think our community is one of the best thanks to people like you!

Get your subscription!

The Proxmox team works very hard to make sure you are running the best software and getting stable updates and security enhancements, as well as quick enterprise support. Tens of thousands of happy customers have a Proxmox subscription. Get yours easily in our online shop.

Buy now!