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CPU Overcommit Ratio Question

asked 2015-12-29 22:42:57 -0500

vblando gravatar image

In Amazon EC2 most of its instance types are doing 1 vCPU per CPU thread

Each vCPU is a hyperthread of an Intel Xeon core for M4, M3, C4, C3, R3, HS1, G2, I2, and D2.

If I have to build an OpenStack environment, and would like to match those instance types, would that mean that I have to do a 1:1 cpu_overcommit_ratio?

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answered 2015-12-30 00:15:05 -0500

xiangfei-ma gravatar image

Hi vblando~
The instance type is not relevant.
If your physical CPU support HT tech and it is enabled, OpenStack is as the same as EC2 in that 1 vCPU is a hyper-thread of a physical core.

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Asked: 2015-12-29 22:42:57 -0500

Seen: 704 times

Last updated: Dec 30 '15