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authorMilind Changire <mchangir@redhat.com>2016-10-15 10:49:19 +0530
committerDan Lambright <dlambrig@redhat.com>2016-10-19 12:51:48 -0700
commit460016428cf27484c333227f534c2e2f73a37fb1 (patch)
tree321a1bb0517f622a134b3ab0634d6fea842fdb06 /events/src
parent20d2b36f3acc2f27527b7913d2ad939848395aeb (diff)
cluster/tier: handle fast demotions
Demote files on priority if hi-watermark has been breached and continue to demote until the watermark drops below hi-watermark. Monitor watermark more frequently. Trigger demotion as soon as hi-watermark is breached. Add cluster.tier-emergency-demote-query-limit option to limit number of files returned from the database query for every iteration of tier_migrate_using_query_file(). If watermark hasn't dropped below hi-watermark during the first iteration, the next iteration will be triggered approximately 1 second after tier_demote() returns to the main tiering loop. Update changetimerecorder xlator to handle query for emergency demote mode. Add tier-ctr-interface.h: Move tier and ctr interface specific macros and struct definition from libglusterfs/src/gfdb/gfdb_data_store.h to new header libglusterfs/src/tier-ctr-interface.h Change-Id: If56af78c6c81d37529b9b6e65ae606ba5c99a811 BUG: 1366648 Signed-off-by: Milind Changire <mchangir@redhat.com> Reviewed-on: http://review.gluster.org/15158 Smoke: Gluster Build System <jenkins@build.gluster.org> CentOS-regression: Gluster Build System <jenkins@build.gluster.org> NetBSD-regression: NetBSD Build System <jenkins@build.gluster.org> Reviewed-by: Dan Lambright <dlambrig@redhat.com>
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