27857c3373
If we're creating multiple servers, there is a chance the scheduler returned the same host for more than one of them, which means we could be redundantly looking up the AZ for the same host multiple times. This could happen when creating multiple servers in the same strict affinity group, or simply if the scheduler is configured with a pack-first strategy for filling up hosts. The get_host_availability_zone() method does not use its own internal cache, so this change adds a simple cache to the schedule_and_build_instances method itself so that we only lookup the AZ per unique host once. Note that build_instances suffers from the same issue but that is only called for scheduling with cells v1 which is deprecated so we shouldn't need to care about optimizing that method. Change-Id: I2ae5ae7240e5183acca7492ddad017c0c878835b Closes-Bug: #1785327 |
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.. | ||
tasks | ||
__init__.py | ||
api.py | ||
manager.py | ||
rpcapi.py |