Bug 1263293

Summary:	[RFE] Using MongoDB aggregation pipeline framework for statistics queries instead of map-reduce
Product:	Red Hat OpenStack	Reporter:	Eoghan Glynn <eglynn>
Component:	openstack-ceilometer	Assignee:	Eoghan Glynn <eglynn>
Status:	CLOSED ERRATA	QA Contact:	Yurii Prokulevych <yprokule>
Severity:	low	Docs Contact:
Priority:	medium
Version:	8.0 (Liberty)	CC:	jruzicka, jschluet, nbarcet, yeylon
Target Milestone:	beta	Keywords:	FutureFeature, OtherQA
Target Release:	8.0 (Liberty)
Hardware:	Unspecified
OS:	Unspecified
URL:	https://blueprints.launchpad.net/ceilometer/+spec/mongodb-aggregation-pipeline
Whiteboard:	upstream_milestone_liberty-2 upstream_definition_approved upstream_status_implemented
Fixed In Version:	openstack-ceilometer-5.0.0-1.el7ost	Doc Type:	Enhancement
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2016-04-07 21:08:43 UTC	Type:	Bug
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Eoghan Glynn 2015-09-15 13:48:17 UTC

In icehouse, usuage of the MongoDB aggregation pipeline framework for statistics queries was dropped in favor of a plain ol' map-reduce, due to ungraceful out-of-memory conditions arising out of the sorting/filtering logic in the 2.2-era MongoDB aggregation pipeline.

Since these issues have been apparently resolved in MongoDB 2.6, the aggregation pipeline has been reinstated.

This needs to be verified by QE to ensure that the out-of-memory problems are indeed resolved.

Comment 4 Yurii Prokulevych 2016-03-21 10:31:52 UTC

Tried statistics call with 1 million of samples.
Packages:
ceilometer*-5.0.2-2.el7ost.noarch
mongodb*-2.6.11-1.el7ost.x86_64

Comment 6 errata-xmlrpc 2016-04-07 21:08:43 UTC

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

https://rhn.redhat.com/errata/RHEA-2016-0603.html