Huang,
If you are willing to modify code, you might want to take a look at the code at
lp:~usc-isi/nova/hpc-trunk that has a scheduler (nova/scheduler/arch.py) that
does not allow creating new instances if cpu or other resources are used up. If
you have any question on the branch, please feel
Hi Huang:
You can use the simple scheduler, allocates new instances to hosts that have
the fewest instances currently running.
--scheduler_driver=nova.scheduler.simple.SimpleScheduler
More sophisticated schedulers are currently under active development, but they
haven't made it to the trunk
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