mmmmmm i had this problem before .... i think it was TCP offliading or RX/TX checksumming. I'd say play with ethtool and see if it makes any difference disabling this flags (or enabling them) Im on #cloudstack@freenode if you want to pop in.
Thanks On Thu, Apr 2, 2015 at 3:12 PM, Pankaj Singh <pank.sin9...@gmail.com> wrote: > We have two different network on two similar switches. One is our > 192.168.1.0/24 and other is 192.168.2.0/24 network. > Our switch capacity is 1000Mbps and so does our NIC cards on Host machines. > > On n/w 192.168.1.0/24, we are using xenserver 6.2 to deploy our Virtual > machines and > we can able to achieve persistent 75 to 80 MB/s speed while transferring > (via scp) one 12GiB file from one VM to another VM on same Xenserver. > > We are using 192.168.2.0/24 network for our cloudstack setup. > We have used following software with their version to establish out private > cloud: > > > Cloudstack = v4.4.2 > Management Server On = Centos 6.4 x86_64 bit > Xenserver as a hypervisor = v6.2 (similar configuration of machine as we > have used in 192.168.1.0/24 n/w) > FreeNAS as a Primary and Secondary Storage via NFS = v9.3 (filesystem is > ZFS based) > Virtual Machine OS = Centos 6.5 x86_64 bit > > We are using basic networking with its all default configurations but we > are not able to achieve at least 60 to 65 MB/s of transferring speed. > > In cloud If we start scp from one machine to another machine then our > transferring speed starts from 63 MB/s and then its keep falling till 20 to > 25 MB/s. > > Would you please tell us that what we are missing here. Is ther any kind of > global setting we need to configure so that at least we can achieve more > than 50 MB/s transferring speed between two guest VM. > > > Thanks and Regards > PankaJ Singh >
