[StarCluster] use of cr1.8xlarge instances

[Rayson Ho]

It's not StarCluster that is restricting the number of nodes in your
cluster -- in fact, StarCluster can be used to start clusters that are
100 (or even 1,000 and larger) without changing any code in
StarCluster. In fact, StarCluster does not know if you are hitting the
20 on-demand instance limit because there is no API to check the value
and you can request AWS to increase the number fairly easily.

Back to the 2 cr1.8xlarge instances issue, it's actually the EC2 limit
for on-Demand for the instance type:

http://aws.amazon.com/ec2/faqs/#How_many_instances_can_I_run_in_Amazon_EC2

Rayson

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On Fri, Jul 5, 2013 at 11:41 PM, Sergio Mafra <sergiohmafra at gmail.com> wrote:
> Dear friends,
>
> Despite the limit of 20 running instances per account, MIT StarCluster does
> not allow me to provision more than 2 instances in on demand mode. If use
> them as spot, it´s OK.
>
> Can you tell me why this?
>
> All the best,
>
> Sergio
>
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