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I definitely agree with you Chris
-- 
Razique

On 7 Nov 2013 at 11:08:33, Chris Friesen (chris.friesen at windriver.com) wrote:

On 11/07/2013 12:53 PM, Razique Mahroua wrote:
> I think during the migrations, the compute topic already checks whether  
> or not the storage is a shared one  

You are correct, but it does it by creating a temporary file on one node  
and testing for it on the other node. Kind of ugly, and this technique  
doesn't work for the "evacuate" case where one of the compute nodes is down.  

Also, the "nova host-evacuate" command currently cannot handle a mix of  
instances on local storage and instances booting from cinder volumes  
(which counts as shared storage, as far as I can tell). So you have to  
do all of one type one at a time, and then you can do the rest all in a  
bunch.  

Chris  

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