[pve-devel] default I/O scheduler - CFQ or Deadline?

Dietmar Maurer dietmar at proxmox.com
Wed May 8 17:37:57 CEST 2013


> Could you share the test conditions?
> I tried to reproduce on:
> 1) Hardware RAID 0+1 with write cache and BBU + ext3, "dbench -t 60 50"
> resulted with the "deadline" just a bit faster
> 2) HDD 500GB (Desktop system) + ext4, "dbench -t 60 50" resulted with almost
> no difference between CFQ and DEADLINE

It seems to depend on the Hardware somehow. We were never able to
find out why it is slow on some HW, and fast on other.



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