Scaling the Boot Barrier: Identifying & Eliminating Contention in Openstack

317 views · Published 3 May 2013 · 42:33 · Indexed 24 October 2026

Channel: OpenInfra Foundation · 2013 · Science & Technology

Watch on YouTube

Speaker: Peter Feiner, gridcentric

On a beefy machine (24 cores, 96 GB RAM, SSD), booting a single instance (from "nova boot"" to ACTIVE) takes seconds. However, when you try booting 20 instances in parallel, the last instance might not be ACTIVE for minutes! While you're waiting, you notice that the host's CPUs and disk are mostly idle and there's plenty of free RAM. While your instances are BUILDING, you wonder what's going on -- why's this taking so long?

For more summit videos, visit: http://www.openstack.org/summit/portland-2013/session-videos/

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