[DRBD-user] DRBD, Xen, HVM and live migration

Bart Coninckx bart.coninckx at telenet.be
Fri Sep 23 18:18:27 CEST 2011

Note: "permalinks" may not be as permanent as we would like,
direct links of old sources may well be a few messages off.

On 09/23/11 13:03, Felix Frank wrote:
> On 09/23/2011 12:49 PM, Arnold Krille wrote:
>> And if there is a penalty for using image-files for the vm, I haven't
>> encountered any.
> That's literally the first time I hear someone make this statement, ever.
> But then, I never did any benchmarks myself and have to rely on heresay.
> Still, depending on your workload, I can see no reason why direct disk
> access shouldn't have (at least potential) performance advantages.
> Furthermore, I see little benefit in image files (in the OP's scenario,
> who isn't gunning for a 4+ node cluster).
> Still, your cluster sketch is quite intriguing.
> Cheers,
> Felix
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So we have basically someone suggesting image file backends on a 
clustered FS on dual primary DRBD and someone else aiming for block 
devices offered directly by DRBD.

do you combine your setup with clustering software? Or do you script a 
live migration? I'm intrigued by how you handle the timing in the latter 


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