Bug 1104459

Summary:	RFC: make epoll multithreaded
Product:	[Red Hat Storage] Red Hat Gluster Storage	Reporter:	ssamanta
Component:	glusterd	Assignee:	Vijaikumar Mallikarjuna <vmallika>
Status:	CLOSED ERRATA	QA Contact:	Ben Turner <bturner>
Severity:	low	Docs Contact:
Priority:	urgent
Version:	rhgs-3.0	CC:	annair, bmohanra, kparthas, mzywusko, nlevinki, nsathyan, rcyriac, rhinduja, rjoseph, sasundar, smohan, srangana, ssamanta, vagarwal, vbellur, vmallika
Target Milestone:	---	Keywords:	ZStream
Target Release:	RHGS 3.0.4
Hardware:	x86_64
OS:	Unspecified
Whiteboard:
Fixed In Version:	glusterfs-3.6.0.48-1	Doc Type:	Enhancement
Doc Text:	Previously, epoll thread did socket even-handling and the same thread was used for serving the client or processing the response received from the server. Due to this, other requests were in a queue untill the current epoll thread completed its operation. With multi-threaded epoll, events are distributed that improves the performance due the parallel processing of requests/responses received.	Story Points:	---
Clone Of:	1096729
Clones:	1104462 (view as bug list)		Environment:
Last Closed:	2015-03-26 06:34:13 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:
Bug Depends On:	1096729, 1193995, 1194525, 1196956
Bug Blocks:	1088355, 1097224, 1098021, 1098025, 1104462, 1182947

Comment 2 Vijaikumar Mallikarjuna 2014-06-10 07:37:51 UTC

We need to change the epoll thread model and make it lighter.

http://review.gluster.com/3842 is one such approach.

Comment 4 Nagaprasad Sathyanarayana 2015-02-12 07:30:15 UTC

Patches merged:

https://code.engineering.redhat.com/gerrit/#/c/41473/ (http://review.gluster.org/#/c/9399/)
https://code.engineering.redhat.com/gerrit/#/c/41474/ (http://review.gluster.org/#/c/9413/)
https://code.engineering.redhat.com/gerrit/#/c/41475/ (http://review.gluster.org/#/c/9237/)
https://code.engineering.redhat.com/gerrit/#/c/41476/ (http://review.gluster.org/#/c/9421/)
https://code.engineering.redhat.com/gerrit/#/c/41477/ (http://review.gluster.org/#/c/9488/)

Pending merge:
https://code.engineering.redhat.com/gerrit/41758 
http://review.gluster.org/#/c/9604/

Comment 8 Ben Turner 2015-03-19 17:05:06 UTC

Verified on 3.6.0.53.

Comment 9 Bhavana 2015-03-24 03:45:20 UTC

Hi vijai,


The doc text is updated. review the same and sign off if it looks ok.

Comment 10 Vijaikumar Mallikarjuna 2015-03-24 05:28:48 UTC

doc text looks good to me

Comment 12 errata-xmlrpc 2015-03-26 06:34:13 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/RHBA-2015-0682.html