Bug 1411110

Summary:	Cold Merge: Improve polling of prepareMerge and finalizeMerge steps
Product:	[oVirt] ovirt-engine	Reporter:	Ala Hino <ahino>
Component:	BLL.Storage	Assignee:	Ala Hino <ahino>
Status:	CLOSED CURRENTRELEASE	QA Contact:	Raz Tamir <ratamir>
Severity:	medium	Docs Contact:
Priority:	unspecified
Version:	4.1.0	CC:	ahino, bugs, eberman, gklein, ratamir, tnisan
Target Milestone:	ovirt-4.1.0-beta	Flags:	rule-engine: ovirt-4.1+
Target Release:	4.1.0.2
Hardware:	Unspecified
OS:	Unspecified
Whiteboard:
Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2017-02-15 14:58:17 UTC	Type:	Bug
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Verified Versions:		Category:	---
oVirt Team:	Storage	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Ala Hino 2017-01-08 12:42:53 UTC

Description of problem:
Polling of prepareMerge and finalizeMerge steps (these are SOM Tasks) can be improved by not doing the pre-pollling.

How reproducible:
100%

Steps to Reproduce:
1. Run cold merge

Comment 1 Yaniv Kaul 2017-01-08 13:46:08 UTC

severity?

Comment 2 Carlos Mestre González 2017-01-24 13:18:26 UTC

Can you provide a way to verify this? Not much information on what is suppose to improve (see the pre-polling were not there?)

Comment 3 Ala Hino 2017-01-24 15:06:25 UTC

This fix actually improves performance of cold merge. Maybe you could compare performance of a build containing the patch with a (previous) build that doesn't contain the patch.

Comment 4 Raz Tamir 2017-01-24 15:27:54 UTC

According to comment #3, Eyal, can you please check whether the performance actually improved?

Comment 5 Raz Tamir 2017-02-07 14:24:12 UTC

Verified on ovirt-engine-4.1.0.4-0.1.el7

Previously live merge took ~ 1 minute for a VM with 4 disks
Now, it takes ~ 40 secs