Invalidated in favor of the created blueprint to fix this [1].
[1] https://blueprints.launchpad.net/keystone/+spec/list-role-
assignments-performance
** Changed in: keystone
Status: In Progress => Invalid
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https://bugs.launchpad.net/bugs/1359231
Title:
List role assignments filters performance
Status in OpenStack Identity (Keystone):
Invalid
Bug description:
When listing role assignments, we have the option to filter them by actor,
target and role.
As Henry Nash pointed out at [1] , the current implementation uses the
standard filtering the V3.wrap_collection. Given the large number of individual
assignments, this is pretty inefficient.
The controller should pass the filters into the driver call, so that the list
size is kept a minimum.
For example, if the user wants to filter role assignments by project X, the
driver would query the DB only selecting the role assignments where target_id =
X.id, instead of querying everything and returning the result to be filtered by
the controller.
[1]
https://github.com/openstack/keystone/blob/498a0032db89997244d3dc7e65ce9b37eac84283/keystone/assignment/controllers.py#L860-L864
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