Re: [Xen-users] VM checkpoint/restart and migration

["Dirk H. Schulz" <dirk.schulz@xxxxxxxxxxxxx>]

Andreea Costea schrieb:
> Hi,
>
> i am quite new to Xen, I want to do some experiments and I would like 
> to know the followings regarding some of the Xen Hypervisor features:
> *Context A: *2 hosts in the same LAN, 2 VMs on top of each host and a 
> NFS storage with the disk images between the hosts. Host 1 contains 
> VM1 and VM2 and Host 2 contains VM3 and VM4. All VMs have private IPs.
> 1. Save/restore: I run an application that was communicating with all 
> 4 VMs in the same time. I suspended the application and I saved the 
> state of VM1 to the shared storage and than restart VM1 from that file 
> on top of Host2. Than I resumed the application and it continued it's 
> execution successfully. So this means that the connections were 
> preserved.
Interesting. An application should have some kind of timeout for open 
sessions; in any case this depends very much on how the app handles 
this. This test delivers by no means a valuable general result (sorry 
for hitting into it so directly).
You have to test this separately for every application you plan to deploy.

Dirk


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