** Changed in: nova
Status: Fix Committed => Fix Released
** Changed in: nova
Milestone: None => havana-3
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https://bugs.launchpad.net/bugs/1181895
Title:
Need fix performance issue during spawn with powervm driver
Status in OpenStack Compute (Nova):
Fix Released
Bug description:
nova-compute is single threaded , and powervm driver will caculate
image file's checksum ,then ftp the image to the IVM, maybe need
compress and decompress the image file . In this situation , nova-
compute can't process any other work .
The following is suggestion from libvirt developer :
"We have code similar to this in libvirt, and people complain about it all
the time. The big problem is that if an image is large, nova-compute is going
to lock up calculating this checksum. Because nova-compute is single threaded,
you wont process any other work while performing this calculation.
I wonder if you should add some time.sleep(0) calls? This would act as a
yield of the thread for eventlet."
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