[Bugs] [Bug 1224596] [RFE] Provide hourly scrubbing option

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1224596



--- Comment #7 from Anand Avati <aavati at redhat.com> ---
COMMIT: http://review.gluster.org/10893 committed in master by Vijay Bellur
(vbellur at redhat.com) 
------
commit 6fc12a43f3e20ea24969e5a3c949f7c27d9c1893
Author: Venky Shankar <vshankar at redhat.com>
Date:   Thu May 21 19:55:02 2015 +0530

    features/bitrot: reimplement scrubbing frequency

    This patch reimplments existing scrub-frequency mechanism used
    to schedule scrubber runs. Existing mechanism uses periodic
    sleeps (waking up periodically on minimum granularity) and
    performing a number of tracking checks based on counters and
    sleep times. This patch does away with all the nifty counters
    and uses timer-wheel to schedule scrub runs.

    Scheduling changes are peformed by merely calculating the new
    expiry time and calling mod_timer() [mod_timer_pending() in
    some cases] making the code more debuggable and easier to
    follow. This also introduces "hourly" scrubbing tunable as an
    aid for testing scrubbing during development/testing cycle.

    One could also implement on-demand scrubbing with ease: by
    invoking mod_timer() with an expiry of one (1) second, thereby
    scheduling a scrub run the very next second.

    Change-Id: I6c7c5f0c6c9f886bf574d88c04cde14b76e60a8b
    BUG: 1224596
    Signed-off-by: Venky Shankar <vshankar at redhat.com>
    Reviewed-on: http://review.gluster.org/10893
    Reviewed-by: Gaurav Kumar Garg <ggarg at redhat.com>
    Tested-by: NetBSD Build System
    Reviewed-by: Vijay Bellur <vbellur at redhat.com>

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