Open Stack

Per the Openstack documentation, it's implied that both vCPUs and memory
are to be released when an instance is successfully suspended. However,
when I suspend an instance, neither resources are reclaimed.

Documentation:
http://docs.openstack.org/user-guide/content/suspend_resume.html

Administrative users might want to suspend an instance if it is
infrequently used or to perform system maintenance. When you suspend an
instance, its VM state is stored on disk, all memory is written to disk,
and the virtual machine is stopped. *Suspending an instance is similar to
placing a device in hibernation; memory and vCPUs become available to
create other instances.*

Releasing resources would be extremely helpful for my situation, which is I
have users who have their own instances that they use on demand for a short
period of time (basically a lab). The majority of an instance's life is
wasted CPU cycles. The only workaround is to create a snapshot, destroy the
instance and then re-deploy from the snapshot, but this is both tedious and
time consuming...also, in our environment, the services running on the
machine will not handle a sudden IP change very gracefully.
(cross-post from
https://ask.openstack.org/en/question/32826/why-doesnt-suspend-release-vcpusmemory/)


Cheers,

-- 
Ricky Saltzer


-- 
Ricky Saltzer
http://www.cloudera.com
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