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[Joseph Suh <jsuh@xxxxxxx>]

Luis,

You can also take a look at USC-ISI's scheduler for heterogeneous systems that checks resource availability as well. Currently, it checks number of cpus, memory space, and hard disk space. If available resource is not enough, it does not allow a new instance.

The branch can be found at lp:~usc-isi/nova/hpc-trunk.

Thanks,

Joseph

----- Original Message -----
From: "Luis Miguel Silva" <luismiguelferreirasilva@xxxxxxxxx>
To: openstack@xxxxxxxxxxxxxxxxxxx
Sent: Thursday, May 5, 2011 9:08:02 PM
Subject: [Openstack] Extending Openstack's scheduling capabilities

Dear all,

I'm evaluating Openstack and i'm interested in extending it's
scheduling capabilities.
So i'm looking for ways to replace Openstack's scheduler component
with my own (so i can route the requests to an external scheduler that
the company i work for develops).

Any ideas on how i can do it?

During my research, i found that there are 3 scheduling types in Openstack:
- chance scheduler
- zone scheduler
- and the simple scheduler

Is the scheduler component in Openstack modular / easy to replace?
What options do i have?

p.s. i've also found a post saying
(http://webcache.googleusercontent.com/search?q=cache:AI0tmD2qMxsJ:https://bugs.launchpad.net/nova/%2Bbug/766444+openstack+bypass+scheduler&cd=1&hl=en&ct=clnk&gl=us&source=www.google.com):
"I've seen plenty of questions come in asking how to launch a VM on a
particular compute node. I learned this is available with the burnin
merge, where you can bypass the scheduler, but no documentation was
included with that code. Please document it - I can review and edit as
needed."
Any idea where i can get more information on the subject?

Thanks in advance,
Luis Silva

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