Hi, The basic patches for md-cache and integrating it with cache-invalidation is merged in master. You could try master build and enable the following settings, to see if there is any impact on tiering performance at all:
# gluster volume set <volname> performance.stat-prefetch on # gluster volume set <volname> features.cache-invalidation on # gluster volume set <volname> performance.cache-samba-metadata on # gluster volume set <volname> performance.md-cache-timeout 600 # gluster volume set <volname> features.cache-invalidation-timeout 600 Note: It has to be executed in the same order. Tracker bug: https://bugzilla.redhat.com/show_bug.cgi?id=1211863 Patches: http://review.gluster.org/#/q/status:open+project:glusterfs+branch:master+topic:bug-1211863 Thanks, Poornima
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