Matt Riedemann 677c95280b Cache host to cell mapping in HostManager ... If the instances per host are not cached in the HostManager we lookup the HostMapping per candidate compute node during each scheduling request to get the CellMapping so we can target that cell database to pull the instance uuids on the given host. For example, if placement returned 20 compute node allocation candidates and we don't have the instances cached for any of those, we'll do 20 queries to the API DB to get host mappings. We can improve this by caching the host to cell uuid after the first lookup for a given host and then after that, get the CellMapping from the cells cache (which is a dict, keyed by cell uuid, to the CellMapping for that cell). Change-Id: Ic6b1edfad2e384eb32c6942edc522ee301123cbc Related-Bug: #1737465 (cherry picked from commit 3a69fdb333)		2019-08-13 13:38:14 -04:00
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client	Change a log level for overwriting allocation	2019-04-16 13:34:47 +00:00
filters	Remove the CachingScheduler	2018-10-18 17:55:36 -04:00
weights	Per aggregate scheduling weight	2019-01-21 11:48:44 +08:00
__init__.py	Improve hacking rule to avoid author markers	2014-05-05 14:35:20 +02:00
driver.py	Remove the CachingScheduler	2018-10-18 17:55:36 -04:00
filter_scheduler.py	Fix WeighedHost logging regression	2019-03-05 17:16:23 -05:00
host_manager.py	Cache host to cell mapping in HostManager	2019-08-13 13:38:14 -04:00
manager.py	Cache host to cell mapping in HostManager	2019-08-13 13:38:14 -04:00
request_filter.py	Honor availability_zone hint via placement	2018-05-22 08:56:50 -07:00
rpcapi.py	Use long_rpc_timeout in select_destinations RPC call	2018-11-20 09:03:53 -05:00
utils.py	Remove redundant group host setup	2019-06-25 11:23:28 +00:00