Bug 1428089

Summary:	cluster/afr: Hybrid Halo mounts
Product:	[Community] GlusterFS	Reporter:	Vijay Bellur <vbellur>
Component:	replicate	Assignee:	bugs <bugs>
Status:	CLOSED DEFERRED	QA Contact:
Severity:	unspecified	Docs Contact:
Priority:	unspecified
Version:	mainline	CC:	bugs, ravishankar
Target Milestone:	---	Keywords:	Triaged
Target Release:	---
Hardware:	Unspecified
OS:	Unspecified
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Fixed In Version:		Doc Type:	If docs needed, set a value
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Clone Of:		Environment:
Last Closed:	2019-03-08 04:41:51 UTC	Type:	---
Regression:	---	Mount Type:	---
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Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:

Description Vijay Bellur 2017-03-01 19:06:45 UTC

cluster/afr: Hybrid Halo mounts

Summary:
- Implements "Hybrid" halo mounts which perform write FOPs synchronously
  to all regions and read FOPs asynchronously to those nodes within the
  region.
- Leverages the fact that the inode cache stores "hints" as to the
  clean/dirty state of upto 16 replicas in the cluster; upon refresh of
  an inode we can do a fresh lookup to get a "wise" node if none exist
  in our region
- Activated via the cluster.halo-hybrid-mode option

Test Plan:
- Run AFR prove tests
- Run halo prove tests

Reviewers: kvigor, sshreyas

Reviewed By: kvigor, sshreyas

FB-commit-id: aca760757afd45e4de2e28dc31b87a73ee52f12d

Change-Id: Ic6728ce93b7b96e3151dccdebccd30e007f4750c
Signed-off-by: Kevin Vigor <kvigor>
Reviewed-on: http://review.gluster.org/16306
CentOS-regression: Gluster Build System <jenkins.org>
NetBSD-regression: NetBSD Build System <jenkins.org>
Smoke: Gluster Build System <jenkins.org>
Reviewed-by: Shreyas Siravara <sshreyas>

Comment 1 Ravishankar N 2019-03-08 04:41:51 UTC

Basic halo replication functionality is present in master.There are no immediate plans for forward porting any pending halo related patches from the release-3.8-fb branch into master, hence closing the bug. Please feel free to re-open if there is a need for re-assessment.