Discussion thread: http://www.gluster.org/pipermail/gluster-devel/2016-February/048454.html
REVIEW: http://review.gluster.org/13833 (features/bitrot: Use rchecksum interface for checksum) posted (#3) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13833 (features/bitrot: Use rchecksum interface for checksum) posted (#4) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#1) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#2) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13833 (features/bitrot: Use rchecksum interface for checksum) posted (#5) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#3) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#4) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#5) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#6) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#7) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#8) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#9) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#10) for review on master by Kotresh HR (khiremat)
REVIEW: http://review.gluster.org/13969 (features/bitrot: On demand scrub on tiering migration) posted (#11) for review on master by Kotresh HR (khiremat)
Patch https://review.gluster.org/#/c/glusterfs/+/21331/ removes tier functionality from GlusterFS. https://bugzilla.redhat.com/show_bug.cgi?id=1642807 is used as the tracking bug for this. Recommendation is to convert your tier volume to regular volume (either replicate, ec, or plain distribute) with "tier detach" command before upgrade, and use backend features like dm-cache etc to utilize the caching from backend to provide better performance and functionality.