[StarCluster] Using a hi-I/O instance as the master node in a StarCluster Cluster

[Paolo Di Tommaso]

Hi there, 

The two SSD disks are available as ephemeral volumes, BUT unlike other instance types they are NOT mounted by default. 

This means that you have to format and mount by yourself. 

You may be interested to this thread 

https://forums.aws.amazon.com/message.jspa?messageID=390415#390415



Best,
Paolo


 

On Jan 4, 2013, at 5:44 PM, Dustin Machi <dmachi at vbi.vt.edu> wrote:

> I've never messed with them on AWS, but I assume that these get mounted 
> wherever the local disks get mounted normally.../mnt.  The hi1.4xlarge 
> should have two 1tb volumes mounted 
> (http://aws.typepad.com/aws/2012/07/new-high-io-ec2-instance-type-hi14xlarge.html) 
> or available to mount (fdisk -l).  The don't think the IOPS provisioning 
> will matter much here (for the the read/writes to those volumes anyway), 
> though they may impact the performance of the EBS volume itself of 
> course.
> 
> Dustin
> 
> On 4 Jan 2013, at 11:06, Oppe, Thomas C ERDC-RDE-ITL-MS Contractor 
> wrote:
> 
>> Dear Sir:
>> 
>> 
>> 
>> I was wondering if anyone has tried using a high-performance I/O 
>> instance (e.g., "hi1.4xlarge") as the master node in a StarCluster 
>> cluster, with the other nodes being Sandy Bridge "cc2.8xlarge" 
>> instances.  When I bring up a single "hi1.4xlarge" instance outside of 
>> StarCluster, there is an option to attach one or two 1-TB SSD disks, 
>> but when I bring up a cluster with "hi1.4xlarge" as the master node, 
>> the SSD disks are nowhere to be found.  Is a plug-in necessary to ask 
>> for the SSD disks to be available?  I have a code that needs the 
>> fastest I/O available for writes with a combined size of 100GB during 
>> the run.  I have tried single Standard and Provisioned IOPS EBS 
>> volumes, but the I/O performance to these volumes is poor, even with 
>> "pre-warming".  Has anyone written a plug-in for using striped volumes 
>> in StarCluster?  I would appreciate any comments or pointers to 
>> information.
>> 
>> 
>> 
>> Tom Oppe
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>> StarCluster at mit.edu
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> 
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