[StarCluster] Changing iinstance type for everynode in the cluster

[Rayson Ho]

I've never tried something like this myself, but I believe it would work if
you stop the EBS cluster (*NOT* terminate), and then change the instance
type from the EC2 management Console, and then restart the cluster, then
StarCluster would happily reconfig the cluster for you:

http://star.mit.edu/cluster/docs/latest/manual/launch.html#stopping-an-ebs-backed-cluster

Just a reboot won't do it, as the private IP address changes when you
change the instance type, and /etc/hosts would need to be changed again.

(Test with a 2-node t1.micro cluster and change the type to t2.micro before
doing anything experimental on a real production cluster.)

Rayson

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On Wed, Sep 17, 2014 at 10:53 PM, Ramon Ramirez-Linan <rlinan at navteca.com>
wrote:

> Hi,
>
> Is there a way of changing the instance type for the entire cluster after
> it has already be launched?
>
> I want to launch a 30  nodes cluster with a cheaper instance type to
> ingest data on each node's volume. Each node has a 1TB EBS attached and
> there is no need to share data between nodes (no nfs or anything). Then
> once the data is injected on each node I want to be able to change the
> cluster instances to a more expensive one (more CPU/RAM)
>
> Will cluster reboot let me do that?
>
> Thanks in advance
>
>
>
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