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Date: Thu, 2 Apr 2015 22:41:28 +0530
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Subject: Re: Network performance issue
From: Pankaj Singh <pank.sin9191@gmail.com>
To: users@cloudstack.apache.org
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Still no luck by disabling these flags.
Would you please help us for this.

Thanks & Regards,
PankaJ Singh


On Thu, Apr 2, 2015 at 8:06 PM, Jeronimo Garcia <garciaj.uk@gmail.com>
wrote:

> 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.sin9191@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
> >
>

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