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<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">If the master instance type is not of 'PLACEMENT_GROUP_TYPES' (M3_COMPUTE_TYPES + HVM_ONLY_TYPES + HI_IO_TYPES + HI_STORAGE_TYPES), but the nodes are, a placement
group IS still created, but master isn't part of it. Excellent! c3.large ($0.105/hr on demaind) is of HVM_ONLY_TYPES, so might be a good alternative at $2.52/day (and it's VERY cheap with spot).<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Also: just because the master is 'smaller' doesn't mean you need to disable the queue. StarCluster will give you slots == number of cores. You can manually modify
all.q to be cores - 1 … so you have at least one 'free' core. I like that setup for 'loadbalance' setups, so you get SOME work started at least. Also to launch daemons and stuff encapsulated in GE.<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">Of course if you only have one core to begin with … :)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D">-Hugh<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-size:11.0pt;font-family:"Calibri",sans-serif;color:#1F497D"><o:p> </o:p></span></p>
<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"> starcluster-bounces@mit.edu [mailto:starcluster-bounces@mit.edu]
<b>On Behalf Of </b>Sergio Mafra<br>
<b>Sent:</b> Friday, October 24, 2014 10:05 AM<br>
<b>To:</b> Pablo Escobar<br>
<b>Cc:</b> starcluster@mit.edu<br>
<b>Subject:</b> Re: [StarCluster] is mandatory that master instance is the same kind of instance than compute nodes?<o:p></o:p></span></p>
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<p class="MsoNormal">Hi folks,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">If you decide to have a small instance to be a master node and big ones to run as slaves, what should happens to the placement group? Does StarCluster put only the slaves (depending on the instance size) on the placement group or none?<o:p></o:p></p>
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<p class="MsoNormal">All best,<o:p></o:p></p>
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<p class="MsoNormal"><br>
Sergio<o:p></o:p></p>
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<p class="MsoNormal">On Fri, Oct 24, 2014 at 9:33 AM, Pablo Escobar <<a href="mailto:pescobar001@gmail.com" target="_blank">pescobar001@gmail.com</a>> wrote:<o:p></o:p></p>
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<p class="MsoNormal">Hi Robert,<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">After reading your email I have seen that in the configuration there are two options about instance types, NODE_INSTANCE_TYPE and MASTER_INSTANCE_TYPE<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">So the solution to achieve my desired setup seems to configure the master to not being an exec node and select different type of instance for node and master.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">Thanks for your help and sorry for the beginner question...just doing my first steps with starcluster <o:p></o:p></p>
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<p class="MsoNormal">Pablo.<o:p></o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal">2014-10-24 13:27 GMT+02:00 Petit III, Robert A. <<a href="mailto:robert.petit@emory.edu" target="_blank">robert.petit@emory.edu</a>>:<o:p></o:p></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">Hi Pablo,
<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">If the master is set to not be an exec node, the worker nodes can be a different type. The situation you describe, (small master instance, large compute instances)
is my current set up.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">I believe things are different when the master is set as an exec host. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">Cheers,<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black">Robert<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="font-size:10.0pt;font-family:"Tahoma",sans-serif;color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal" style="margin-bottom:12.0pt"><b><span style="font-family:"Tahoma",sans-serif;color:black">From:</span></b><span style="font-family:"Tahoma",sans-serif;color:black">
<a href="mailto:starcluster-bounces@mit.edu" target="_blank">starcluster-bounces@mit.edu</a> [<a href="mailto:starcluster-bounces@mit.edu" target="_blank">starcluster-bounces@mit.edu</a>] on behalf of Pablo Escobar [<a href="mailto:pescobar001@gmail.com" target="_blank">pescobar001@gmail.com</a>]<br>
<b>Sent:</b> Friday, October 24, 2014 5:48 AM<br>
<b>To:</b> <a href="mailto:starcluster@mit.edu" target="_blank">starcluster@mit.edu</a><br>
<b>Subject:</b> [StarCluster] is mandatory that master instance is the same kind of instance than compute nodes?</span><span style="color:black"><o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Hi, <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">I have been doing some testing with starcluster and I see that by default every machine is the same type of instance and that the sge_master is also an sge_exec node.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">I have read in the documentation that the sge plugin allows to configure the master node to not being an exec node. <o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">The ideal setup for me would be to have the master node being a small instance just running the sge_master and not running jobs and the compute nodes being bigger instances in terms of hardware resources.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">is this setup currently possible in starcluster? or is mandatory that every machine is the same kind of instance?<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">thanks for your help.<o:p></o:p></span></p>
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<p class="MsoNormal"><span style="color:black"><o:p> </o:p></span></p>
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<p class="MsoNormal"><span style="color:black">Pablo.<o:p></o:p></span></p>
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<p class="MsoNormal"><o:p> </o:p></p>
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<p class="MsoNormal"><span style="font-size:7.5pt;font-family:"Arial",sans-serif;color:gray"><br>
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information. If the reader of this message is not the intended<br>
recipient, you are hereby notified that any dissemination, distribution<br>
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If you have received this message in error, please contact<br>
the sender by reply e-mail message and destroy all copies of the<br>
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<p class="MsoNormal"><o:p> </o:p></p>
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_______________________________________________<br>
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