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[Xen-users] Live migration bandwidth limits

To: xen-users@xxxxxxxxxxxxxxxxxxx
Subject: [Xen-users] Live migration bandwidth limits
From: Travis Vachon <Travis.F.Vachon@xxxxxxxxxxxx>
Date: Thu, 26 Jan 2006 11:36:26 -0500
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Hi all

In the Live Migration of Virtual Machines paper available at the Cambridge Xen website migration bandwidth limits are mentioned. Specifically, in its discussion of the dynamic rate limiting algorithm, the paper mentions that an administrator can select upper and lower bandwidth limits for a migration.

I've looked fairly hard, but can't seem to find much information on how to set these. The xm man page mentions an -r/--resource flag which it claims sets the upper bandwidth limit on migration, but when I attempted migration with -r 1 set, the information in xend.log reported transfer rates upwards of 100Mb/s. In addition, I didn't notice any difference in migration time between using the -r 1 flag and not. I haven't been able to find information on setting the lower bandwidth limit at all.

Has this not been implemented (I suppose this might be a more appropriate question for the devel list, but I thought I'd ask here first), or if it has, does anyone have any information on how to do this?

Thanks!

Travis Vachon

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