[sheepdog-users] cache performance test

[Valerio Pachera]

I found the bottle neck of my testing cluster: cpu.
Cache is enabled on an ssd.

Both qemu and sheep uses lot's of cpu.

dd NOT using oflag=direct
  qemu 81%
  sheep 49%
  write speed ~150 M/s

dd using oflag=direct
  qemu 28%
  sheep 69%
  write speed ~80 M/s

What do you think about it?

dd on the host uses ~ 60% cpu and reaches 270 M/s (without oflag=direct)