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Re: [OpenStack] How to speed up the instance launch time?

 


are make in the compute node. So all this takes long an dis proportional to
the image size. Is there any way to speed up this process? Is a SAN based
backend the only way to go?

No, but if you have multiple compute nodes you will want to have them
all share /var/lib/nova/instances on a fast NFS server.  Make sure
that your glance machine is as fast as possible too.  I also mount
/tmp from /dev/shm which makes the snapshot process more tolerable,
but obviously this will require machines with lots of RAM to spare.

The change I made that helped the most was to disable NBD.  You have
to do this in /etc/init/nova-compute.conf and just comment out the
modprobe nbd line.

Mark


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