The network trafficflow is just 40Mb/s-50Mb/s on the management&storage nic when the performance becomes low.
------------------ Original ------------------ From: "Dean Kamali"<dean.kam...@gmail.com>; Date: Sat, Jul 6, 2013 03:42 AM To: "users"<users@cloudstack.apache.org>; Subject: Re: How many vms per primary storage can offer best performance? Well can you tell us more about your setup, before blaming NFS for being slow :) In most cases the hardware is what to blame, Are you using 6Gbps / SATA3 drives? Your 1GB link most likely the bottle neck here, you will need to either bond 4 NICs together or maybe invest in 10G switch. I'm using NFS with SSDs and SATA3 drives / with expensive DELL Raid controller, and 10G Network, I'm able to run 30 - 40 vms with no performance issues. On Fri, Jul 5, 2013 at 1:35 AM, Ignazio Cassano <ignaziocass...@gmail.com>wrote: > Hi, I think nfs is not a good solution. > Try clvm over iscsi or fc. > Regards > Il giorno 04/lug/2013 18:26, "Conrad Geiger" <cgei...@it1solutions.com> ha > scritto: > > > 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. > > >
