Windows spawn time is very long

asked 2014-12-04 11:59:29 -0600

adam__ gravatar image

I have got a basic IceHouse setup running. The compute node is on a beefy server. Spawning Ubuntu & CentOS VMs is very quick. But now I've created my first Windows Server 2012 image (following the OpenStack documentation). It runs fine but it takes a very long time to spawn - > 15 minutes. Is this common? Is there anything I can do to make it quicker?

Thanks for any help

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answered 2014-12-04 13:30:25 -0600

alexpilotti gravatar image

Windows images are pretty big, around 16GB for Windows Server 2012 R2 so it might take some time to copy them from Glance to the target nodes.

After the first time, images are cached locally so booting an image should be very fast, especially for CoW.

BTW official OpenStack Windows Server 2012 R2 evaluation images are available here:

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Thanks for this. After it was cached subsequent spawn times were amazingly better!

adam__ gravatar imageadam__ ( 2014-12-05 11:36:25 -0600 )edit

I have installed devstack on ubuntu 16.04. I fetched windows server 2012 R2 evaluation image from When I create image from openstack dashboard, it takes too much time and remains Queued State whereas when I add cirros image, it works quickly. Any idea?

sheeraz.raza gravatar imagesheeraz.raza ( 2018-03-13 02:33:54 -0600 )edit

It is just because the size of the cirros image is much smaller.

jp95 gravatar imagejp95 ( 2018-07-18 23:31:49 -0600 )edit

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Asked: 2014-12-04 11:59:29 -0600

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Last updated: Dec 04 '14