[Bugs] [Bug 1194753] Storage tier feature

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1194753



--- Comment #34 from Anand Avati <aavati at redhat.com> ---
COMMIT: http://review.gluster.org/9935 committed in master by Vijay Bellur
(vbellur at redhat.com) 
------
commit b4a0db5ee3b827268fe1aeeed32ad7d417460c50
Author: Joseph Fernandes <josferna at redhat.com>
Date:   Wed Mar 18 19:55:31 2015 +0530

    Adding ChangeTimeRecorder(CTR) Xlator to GlusterFS

    **********************************************************************
                                ChangeTimeRecorder(CTR) Xlator           |
    **********************************************************************
    ChangeTimeRecorder(CTR) is server side xlator(translator) which sits
    just above posix xlator. The main role of this xlator is to record the
    access/write patterns on a file residing the brick. It records the
    read(only data) and write(data and metadata) times and also count on
    how many times a file is read or written. This xlator also captures
    the hard links to a file(as its required by data tiering to move
    files).

    CTR Xlator is the consumer of libgfdb.

    To Enable/Disable CTR Xlator:
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~

     gluster volume set <volume-name> features.ctr-enabled {on/off}

    To Enable/Disable Frequency Counter Recording in CTR Xlator:
    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

     gluster volume set <volume-name> features.record-counters {on/off}

    Change-Id: I5d3cf056af61ac8e3f8250321a27cb240a214ac2
    BUG: 1194753
    Signed-off-by: Joseph Fernandes <josferna at redhat.com>
    Reviewed-on: http://review.gluster.org/9935
    Tested-by: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Vijay Bellur <vbellur at redhat.com>

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