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xen-devel
Re: [Xen-devel] Wonky results with pvops live migration under 4.0.1
Forgot to mention, in both ok and failed cases, xend logs a succesful
snapshot/restore on both sides of the migration.
On Feb 4, 2011, at 12:26 , Pim van Riezen wrote:
> Good day,
>
> We migrated one of our Xen clusters to the gitco 4.0.1 release after seeing
> that it seemed to fix the live migration issues we were having under 3.4.3 on
> our test cluster. It turns out our tests had no bearing on our production
> cluster.
>
> The production cluster is a mix of mostly AMD Opteron with a few Intel Xeon.
> Migration issues do not correlate to cpu architectures, however.
>
> I have run a test with a machine running pvops 2.6.32.25 performing live
> migrations. For some source & destination pairs the migration would
> consistently work. For other combinations it would consistently break.
>
> The symptoms when it breaks are that the console does not respond to keyboard
> input. The network does ping. Interactive ssh sessions no longer work. The
> shell is loaded, but it also does not respond to keyboard input.
> Noninteractive ssh calls are normally executed. If a shutdown is sent to the
> vps, the shutdown sequence seems to hang on running sync.
>
> All dom0 nodes run CentOS 5.5 with gitco Xen 4.0.1 repositories. Here is a
> raw dump of some migration tests:
>
> A = 16 cores Xeon, 48GB memory, Emulex FC 8Gb
> B-E = 24 cores Opteron, 128GB memory, Emulex FC 8Gb
>
> C->B OK
> B->C FAIL
> B->C FAIL
> C->B OK
> D->C OK
> C->D FAIL
> C->D FAIL
> B->D FAIL
> D->B OK
> E->F OK
> F->E FAIL
> F->E FAIL
> E->A OK
> A->E FAIL
>
> The guest has 256MB memory, all dom0s are configured in bridging mode (with
> the bridges attached to a vlan interface).
>
> Is there anything I should try?
>
> Cheers,
> Pim van Riezen
>
>
> _______________________________________________
> Xen-devel mailing list
> Xen-devel@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-devel
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