openstack/aodh
Code Issues Proposed changes

Add indexes to MongoDB driver

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Add some compound key indexes for the typical queries
run by the engine. Separate variations are used for
queries with user_id and project_id because they are
usually mutually exclusive and because of the way the
indexes are computed and stored the database won't take
advantage of an index using both.

bug 1021324

Change-Id: I9d6bbd1e7ac5a633fa3ead131a4ebc0a83226633
Signed-off-by: Doug Hellmann <doug.hellmann@dreamhost.com>
This commit is contained in:
Doug Hellmann 2012-07-09 10:49:52 -04:00
parent 1f9bce2609
commit 7526cf6aff
1 changed files with 20 additions and 0 deletions
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20
ceilometer/storage/impl_mongodb.py
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@ -163,6 +163,26 @@ class Connection(base.Connection):
conf.mongodb_host, conf.mongodb_port)
self.conn = self._get_connection(conf)
self.db = getattr(self.conn, conf.mongodb_dbname)
# Establish indexes
#
# We need variations for user_id vs. project_id because of the
# way the indexes are stored in b-trees. The user_id and
# project_id values are usually mutually exclusive in the
# queries, so the database won't take advantage of an index
# including both.
for primary in ['user_id', 'project_id']:
self.db.resource.ensure_index([
(primary, pymongo.ASCENDING),
('source', pymongo.ASCENDING),
])
self.db.meter.ensure_index([
('resource_id', pymongo.ASCENDING),
(primary, pymongo.ASCENDING),
('counter_name', pymongo.ASCENDING),
('timestamp', pymongo.ASCENDING),
('source', pymongo.ASCENDING),
])
return
def _get_connection(self, conf):