Note that “allow_resize_to_same_host” doesn’t force it to stay on the same 
host, it only allows it to happen.  It’s still up to the scheduler as to where 
it goes.  Because we use shared storage at Overstock, we had to work around 
this by disabling all the hypervisors except the one it’s on before doing a 
resize.

We also would love to see a way to prevent copying the disk when the size 
doesn’t change.  It’s annoying when you just want to make a CPU or RAM change 
and have to wait for the disk copy.  The other downside of resizing is that it 
changes your nice, sparsely-provisioned copy-on-write disk image into a full 
size image divorced from the qcow source disk.

Mike Smith
Principal Engineer, Website Systems
Overstock.com<http://Overstock.com>



On Nov 26, 2014, at 10:21 AM, Juan José Pavlik Salles 
<[email protected]<mailto:[email protected]>> wrote:

In Grizzly there's a flag "allow_resize_to_same_host=True" that at least 
shouldn't move the instance from one node to another, but it's not exactly what 
you want.


2014-11-26 12:30 GMT-03:00 Mathias Brito 
<[email protected]<mailto:[email protected]>>:
Hello people,

Is there a away to avoid Openstack of making a copy of the VM when resizing it?

Mathias

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--
Pavlik Salles Juan José
Blog - http://viviendolared.blogspot.com<http://viviendolared.blogspot.com/>
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