I would also say that 8 spindles for 15-20 VMs is low. You are going to run out of iops.
Sent from my Verizon Wireless 4G LTE Smartphone -------- Original message -------- From: Ahmad Emneina <aemne...@gmail.com> Date: 07/04/2013 9:10 AM (GMT-05:00) To: Cloudstack users mailing list <users@cloudstack.apache.org> Subject: Re: How many vms per primary storage can offer best performance? I would google NFS tuning and atomically test changes. Changes vary from the kernel level up through the switches (sizing frames) as well as introducing bonding. YMMV here NFS tuning is a huge part trial and error. On Thu, Jul 4, 2013 at 5:26 AM, WXR <1485739...@qq.com> wrote: > 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.
