Re: [Xen-users] Live migration?

[Daniel Nielsen <djn@xxxxxxxxxx>]

Hi.

Just a short follow-up, I got Live Migration working across our 3 dom0's.
Very nice :) 

The problem was that I am using a custom kernel to enable our debian system
to use our hardware and mount the root fs via NFS. After a kernel recompile
with the option for hot-pluggable CPUs enabled, everything worked like a
charm.

The smaller domU's which migrated nicely were all single-cpu. The domU's
that previously had failed used multiple CPUs.


/Daniel
Portalen
Support? Skriv til support@xxxxxxxxxxxxx


> From: Daniel Nielsen <djn@xxxxxxxxxx>
> Date: Mon, 25 Sep 2006 10:19:39 +0200
> To: <xen-users@xxxxxxxxxxxxxxxxxxx>
> Conversation: [Xen-users] Live migration?
> Subject: Re: [Xen-users] Live migration?
> 
> Hi, 
> 
> I was starting to feel a bit alone ;) But thanks anyway.
> Our NFS uses only UDP, and as I wrote, our domU's with "small" amounts of
> memory works like a charm. It is only the big ones that are troublesome.
> 
> I would really like to have Live Migration working. But no such luck so far
> :( 
> 
> What about the memory requirement I noticed in the log?
> Does anybody know if it is for the dom0? or is it because the machine needs
> free RAM to do Live Migration?
> 
> /Daniel
> Portalen
> 
> 
>> From: Thomas Schneider <listen@xxxxxxxxxx>
>> Date: Fri, 22 Sep 2006 17:17:19 +0200
>> To: <xen-users@xxxxxxxxxxxxxxxxxxx>
>> Subject: Re: [Xen-users] Live migration?
>> 
>> Hi,
>> 
>> just to let you know - you're not alone. We have a similar problem with
>> DomU on nfsroot, migration hangs indefinitely. Our assumption is, that nfs
>> over tcp is preventing the second starting DomU from mounting its root-fs.
>> 
>> Thanks for any help leading to a solution!
>> 
>> Tom
>> 
>> --On 15. September 2006 14:10:59 +0200 Daniel Nielsen <djn@xxxxxxxxxx>
>> wrote:
>>> In the above example, if we wait quite some hours, then serenity will stop
>>> responding, and geonosis will be left with a
>>> 
>>> genosis:/ root# xm list
>>> Name                              ID Mem(MiB) VCPUs State  Time(s)
>>> Domain-0                           0      128     4 r----- 21106.6
>>> Zombie-serenity                    8      2048    2 -----d  3707.8
>>> geonosis:/ root#
>>> 
>> 
>> 
>> 
>> 
>> 
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> 
> 
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