<div dir="ltr">Hugh, thanks for testing instance type change, it was very late last night and I did not have time to test it.<div><br></div><div>Ramon, we can add code in StarCluster to provide support for instance type change, and in my original email I wanted to point out that you need to use StarCluster to stop the cluster first, as changing the instance type means changing the IP of the instance too, and thus a change of instance type without letting StarCluster know wouldn't work.</div><div class="gmail_extra"><br clear="all"><div>Rayson<br><br>==================================================<br>Open Grid Scheduler - The Official Open Source Grid Engine<br><a href="http://gridscheduler.sourceforge.net/" target="_blank">http://gridscheduler.sourceforge.net/</a><br><a href="http://gridscheduler.sourceforge.net/GridEngine/GridEngineCloud.html" target="_blank">http://gridscheduler.sourceforge.net/GridEngine/GridEngineCloud.html</a></div>
<br><div class="gmail_quote">On Thu, Sep 18, 2014 at 10:22 AM, MacMullan, Hugh <span dir="ltr"><<a href="mailto:hughmac@wharton.upenn.edu" target="_blank">hughmac@wharton.upenn.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Wow, I can't believe I never thought of that. Just tested c3.large > c3.8xlarge transformation, and it worked just fine … AWS CLI for the command line win!<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d"><u></u> <u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:#00b050">starcluster start -i c3.large -c mycluster mycluster<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:#00b050">starcluster stop -c mycluster<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:#00b050">starcluster lc ## wait till the nodes are all 'stopped'<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:#00b050">for ID in $(starcluster lc mycluster 2>/dev/null | grep -e node[0-9][0-9][0-9] -e master | awk '{print $3}'); do<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:#00b050"> echo $ID<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:#00b050"> # the magic:<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:#00b050"> aws ec2 modify-instance-attribute --instance-id $ID --instance-type c3.8xlarge<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:#00b050">done<u></u><u></u></span></p>
<p class="MsoNormal"><span style="font-size:9.0pt;font-family:"Courier New";color:#00b050">starcluster start -x mycluster<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">Seems like that could be pretty easily integrated into StarCluster.<u></u><u></u></span></p>
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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1f497d">-Hugh<u></u><u></u></span></p>
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<p class="MsoNormal"><b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif"">From:</span></b><span style="font-size:11.0pt;font-family:"Calibri","sans-serif""> Rayson Ho [mailto:<a href="mailto:raysonlogin@gmail.com" target="_blank">raysonlogin@gmail.com</a>]
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<b>Sent:</b> Thursday, September 18, 2014 1:18 AM<br>
<b>To:</b> Ramon Ramirez-Linan<br>
<b>Cc:</b> MacMullan, Hugh; <a href="mailto:starcluster@mit.edu" target="_blank">starcluster@mit.edu</a><br>
<b>Subject:</b> Re: [StarCluster] Changing iinstance type for everynode in the cluster<u></u><u></u></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">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:<br>
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<a href="http://star.mit.edu/cluster/docs/latest/manual/launch.html#stopping-an-ebs-backed-cluster" target="_blank">http://star.mit.edu/cluster/docs/latest/manual/launch.html#stopping-an-ebs-backed-cluster</a><u></u><u></u></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt">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.<u></u><u></u></p>
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<p class="MsoNormal">(Test with a 2-node t1.micro cluster and change the type to t2.micro before doing anything experimental on a real production cluster.)<u></u><u></u></p>
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<p class="MsoNormal">Rayson<br>
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<p class="MsoNormal">On Wed, Sep 17, 2014 at 10:53 PM, Ramon Ramirez-Linan <<a href="mailto:rlinan@navteca.com" target="_blank">rlinan@navteca.com</a>> wrote:<u></u><u></u></p><span class="">
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<p class="MsoNormal">Hi,<u></u><u></u></p>
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<p class="MsoNormal">Is there a way of changing the instance type for the entire cluster after it has already be launched?<u></u><u></u></p>
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<p class="MsoNormal">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)<u></u><u></u></p>
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<p class="MsoNormal">Will cluster reboot let me do that?<u></u><u></u></p>
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<p class="MsoNormal">Thanks in advance<u></u><u></u></p>
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