md-cache changes and impact on tiering

[Poornima Gurusiddaiah <pgurusid@xxxxxxxxxx>]

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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