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CloudStack add hugepage for improving performance

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CloudStack add hugepage for improving performance

Hi, I'm newbie with CloudStack. 

I would like to know about CloudStack, Does it has automatic function to add hugepage into Virtual Machine. I don't want to do manually. hugepage is a technique that improving memory intensive support on KVM and RHEL. 

 

Thank you.


Ittitep wannarat MEMBERS 16 May 2014 - 07:44 AM
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CloudStack add hugepage for improving performance

I found that in Openebula have "HPC mode" on and off if it's on, it will improve VM performance and HPC mode have NUMA mode, Hugepage and so on. I really want to know about CloudStack.  


Ittitep wannarat MEMBERS 17 May 2014 - 07:52 AM
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Yes, it is possible but you need to understand this.

 

Cloudstack does not interact with a guest VM at that level. The functionality you have mentioned is completely encapsulated within the guest OS and supported by the hypervisor; Cloudstack has no control over this.

 

In Cloudstack you would create a VM from a template or an ISO. You can't do much with ISO installations but when using templates, you can make sure that the template itself has hugepages configured/set so all VMs launched using that template have it configured.

 

Alternately you could also use configuration management tools like Chef/Puppet to automate the configuration on a guest VM after it is up. This would work for both template and ISO based guest installation.

 

Hope this answers your query.


Somesh Naidu CITRIX EMPLOYEES 23 May 2014 - 06:20 AM
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Thank you very much for your recommendation and cloudstack don't provide this festure. In RedHat 5, I must add Hugepage manually in both of physical machine and virtual macine so I realize that RedHat 6 has transparent huge page (TLB) and i don't configure anything, it will be use automatically.


Ittitep wannarat MEMBERS 27 May 2014 - 01:22 AM
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