Hey gang, We have a few machines running Xen. For the purposes of this question they''re laid out this way: machine 1 => guest 1 machine 2 => guest 2 (both guests are stored using LVM on their respective machines) I scp''d a file from guest 1 to guest 2 and had a transfer speed of around 288 Mb/s. Nothing unexpected there. Then I scp''d a file from machine 2 to guest 2 and saw a transfer speed of around 1.2 Mb/s. This is extremely surprising. I would have expected much faster transfer speed primarily because it''s doesn''t have to travel through the network. Can you guys lend any insight to this? _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Mon, Mar 2, 2009 at 3:16 PM, Zach Moazeni <zach.lists@gmail.com> wrote:> Can you guys lend any insight to this?resource contention is far more a limiting factor than bandwidth in Xen. IOW: both Dom0 and DomU were fighting for some resource, either drive heads or (more likely) CPU time. -- Javier _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users
On Mar 2, 2009, at 3:36 PM, Javier Guerra wrote:> On Mon, Mar 2, 2009 at 3:16 PM, Zach Moazeni <zach.lists@gmail.com> > wrote: >> Can you guys lend any insight to this? > > resource contention is far more a limiting factor than bandwidth in > Xen. > > IOW: both Dom0 and DomU were fighting for some resource, either drive > heads or (more likely) CPU time.Ahh interesting. I didn''t think of that. Thanks for the quick response Javier! -Zach _______________________________________________ Xen-users mailing list Xen-users@lists.xensource.com http://lists.xensource.com/xen-users