Re: [Xen-API] XCP 1.6 Storage XenMotion cannot move virtual disks between local SRs

[George Shuklin <george.shuklin@xxxxxxxxx>]

On 03.01.2013 00:35, Alexandre Kouznetsov wrote:
> Hello.
>
> I have made more tests and got a successful migration using Storage 
> XenMotion. It happened only after I have removed the destination XCP 
> host from the actual pool, and moved it to a new one.
> It seems like "destination-sr-uuid=" option is recognized correctly 
> only when a "remote-master=" and other connection details are 
> specified. The neighbor thread 
> http://lists.xen.org/archives/html/xen-api/2012-12/msg00162.html was 
> helpful. Yes, they fly between pools like magic. The option 
> "live=<false|true>" does not make any visible difference: a Debian VM 
> with default 8GB hdd and no activity pauses for around 2 seconds and 
> my shell connection to it is not lost, in both cases, "live=false" and 
> "live=true".
live migration performs set of iterations over VM memory (you can see 
details in /tmp/xenguest.log on source host), live=false performs 'pause 
and copy' mode. They are almost the same for idle machines, but make a 
huge difference for heavy-loaded servers, which change lot of memory 
every second. (F.e. heavy loaded erlang application with work heap about 
10GiB: it live migration performs all 32 iterations and still forced to 
make 'pause and copy' at final round with large memory delta).
> Still not clear how to migrate VM's in the following cases:
> - When VM is not online (vm-migrate insists it should be "running").
> - When origin and destination hosts are within the same pool.
offline croos-pool migration is not supported, AFAIK. Sad, yep.

For in-pool migration there is xe vdi-pool-migration command.


_______________________________________________
Xen-api mailing list
Xen-api@xxxxxxxxxxxxx
http://lists.xen.org/cgi-bin/mailman/listinfo/xen-api