Gavin Ang wrote:
Hi,
Am trying to optimize the disk I/O performance for KVM guests
running on my SmartOS Host (RAID 10 with 4 disks), 8 physical cores,
100G+ RAM.
Running this command: time sh -c "dd if=/dev/zero of=ddfile bs=8k
count=250000 && sync"; rm ddfile
On the Host gives:
real 0m16.051s
user 0m0.186s
sys 0m3.181s
On a Centos guest gives:
real 0m43.182s
user 0m0.032s
sys 0m1.505s
If you don't have log devices, get some!
--
Ian.
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