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Preemptible instances run on a configurable host aggregate, using the freepool by default. Compared to the proposed spec, the use of a separate aggregate allows to better control scheduling of preemptibles. For example, we can prevent preemptible instances from being launched on hosts that are about to be used by reservations. To be used, this feature will need additional support in the main Blazar service. Blueprint: blazar-preemptible-instances Change-Id: I294c22b22a1d9e3df01c56a518476a33782d1196 |
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