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Allocate more disk to bigger instances

asked 2017-06-07 10:05:12 -0500

Martin gravatar image

For example, say that there are two instances running on a server, one VM is m1.large and the other is m1.medium. Both are running disk intensive tasks, is the m1. large given more slice of the disk space to run its workload over the m1.medium instance?

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answered 2017-06-07 17:00:39 -0500

This depends on Nova's configuration and the way the instance is launched. Let's look at a common (perhaps most common) case, KVM hypervisor and ephemeral disks implemented with qcow2 files.

In this scenario, the virtual disk size of your instance depends on the flavor. The physical disk size depends on the amount of space the instance actually uses. In other words, the instance receives as much physical disk space as it allocates, up to the limit imposed by the flavor.

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Asked: 2017-06-07 10:05:12 -0500

Seen: 46 times

Last updated: Jun 07 '17