I use NFS share as primary storage,the NFS share is on a 8 SATA HDDs RAID10 volume. The network link is gigabit ethernet.The switch is dell powerconnect.
When I just create 15-20 vm instances and start them(not run any software on them),I find the disk IO performance of the vm is very low. If a file copy job on a pc needs 10 minutes , the same job on the vm needs 20minutes. I don't know if it is normal,and I want to know the correct configuration of the primary storage,I need your suggests with enough experience.
