[Bugs] [Bug 1200082] [FEAT] - Sharding xlator

[bugzilla at redhat.com]

https://bugzilla.redhat.com/show_bug.cgi?id=1200082



--- Comment #7 from Anand Avati <aavati at redhat.com> ---
COMMIT: http://review.gluster.org/9841 committed in master by Vijay Bellur
(vbellur at redhat.com) 
------
commit 6f389fbb812b384bdd9bf4a20e86930505531996
Author: Krutika Dhananjay <kdhananj at redhat.com>
Date:   Fri Nov 21 11:47:23 2014 +0530

    features/shard: Introducing sharding translator

    Based on the high-level design by Anand V. Avati which can be found @
   
https://gist.github.com/avati/af04f1030dcf52e16535#sharding-xlator-stripe-20

    Still to-do:
            * complete implementation of inode write fops - [f]truncate,
              zerofill, fallocate, discard
            * introduce transaction mechanism in inode write fops
            * complete readv
            * Handle open with O_TRUNC
            * Handle unlinking of all shards during unlink/rename
            * Compute total ia_size and ia_blocks in lookup, readdirp, etc
            * wind fsync/flush on all shards

            Note: Most of the items above are related. Once we come up
            with a clean way to determine the last shard/shard count for
            a file/file size and the mgmt of sparse regions of the file,
            implementing them becomes trivial.

    Change-Id: Id871379b53a4a916e4baa2e06f197dd8c0043b0f
    BUG: 1200082
    Signed-off-by: Krutika Dhananjay <kdhananj at redhat.com>
    Reviewed-on: http://review.gluster.org/9841
    Tested-by: Gluster Build System <jenkins at build.gluster.com>
    Reviewed-by: Vijay Bellur <vbellur at redhat.com>

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