[Bugs] [Bug 1428090] New: cluster/afr: Hybrid mounts must honor _marked_ up/ down states

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1428090

            Bug ID: 1428090
           Summary: cluster/afr: Hybrid mounts must honor _marked_ up/down
                    states
           Product: GlusterFS
           Version: mainline
         Component: core
          Assignee: bugs at gluster.org
          Reporter: vbellur at redhat.com
                CC: bugs at gluster.org



cluster/afr: Hybrid mounts must honor _marked_ up/down states

Summary:
- Qsorted latencies must also take into account that a host can be
  marked down yet still have a (slightly) better latency.  This can
  happen if max-replicas is reached, and there are multiple bricks which
  meet the halo threshold.  In such a case we must prefer the brick
  which is marked up albeit with a perhaps slightly higher latency.
  It's not worth doing any sort of swap in this case as it's going to be
  jarring to the cluster and introduce flapping behavior.

Test Plan: - Halo prove tests @ https://phabricator.fb.com/P56251020

Reviewers: sshreyas, kvigor

Reviewed By: kvigor

Blame Revision: Change-Id: I858bbf44638a4978093dc56d4a98c96be4f8b45e

Change-Id: Ie3b79700ec63398bc30e7bcf75fb05931dd5d0d0
FB-commit-id: deb2f35db6f8b979857b4e3779b2a41c59a2e416
Signed-off-by: Kevin Vigor <kvigor at fb.com>
Reviewed-on: http://review.gluster.org/16307
CentOS-regression: Gluster Build System <jenkins at build.gluster.org>
NetBSD-regression: NetBSD Build System <jenkins at build.gluster.org>
Reviewed-by: Shreyas Siravara <sshreyas at fb.com>
Smoke: Gluster Build System <jenkins at build.gluster.org>

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