Adding Features and planning features to glusterfs-specs repo

As per the discussion (http://www.gluster.org/pipermail/gluster-users/2015-July/022918.html)
the specs are part of this repo.

Signed-off-by: hchiramm <hchiramm@redhat.com>

1 files changed, 20 insertions, 0 deletions

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+# NUFA Translator
+
+The NUFA ("Non Uniform File Access") is a variant of the DHT ("Distributed Hash
+Table") translator, intended for use with workloads that have a high locality
+of reference.  Instead of placing new files pseudo-randomly, it places them on
+the same nodes where they are created so that future accesses can be made
+locally.  For replicated volumes, this means that one copy will be local and
+others will be remote; the read-replica selection mechanisms will then favor
+the local copy for reads.  For non-replicated volumes, the only copy will be
+local.
+
+## Interface
+
+Use of NUFA is controlled by a volume option, as follows.
+
+	gluster volume set myvolume cluster.nufa on
+
+This will cause the NUFA translator to be used wherever the DHT translator
+otherwise would be.  The rest is all automatic.
+