2.2.2 changelog and authors update

Change-Id: I8c18cfc2cd03242cf3c662494999f255cb7831c6

.mailmap

@@ -69,3 +69,4 @@ Guang Yee <guang.yee@hp.com> <guang.yee@hp.com>
 Jing Liuqing <jing.liuqing@99cloud.net> <jing.liuqing@99cloud.net>
 Lorcan Browne <lorcan.browne@hp.com> <lorcan.browne@hp.com>
 Eohyung Lee <liquidnuker@gmail.com> <liquid@kt.com>
+Harshit Chitalia <harshit@acelio.com> <harshit@acelio.com>

AUTHORS

@@ -39,6 +39,7 @@ Mahati Chamarthy (mahati.chamarthy@gmail.com)
 Zap Chang (zapchang@gmail.com)
 François Charlier (francois.charlier@enovance.com)
 Ray Chen (oldsharp@163.com)
+Harshit Chitalia (harshit@acelio.com)
 Brian Cline (bcline@softlayer.com)
 Alistair Coles (alistair.coles@hp.com)
 Brian Curtin (brian.curtin@rackspace.com)
@@ -159,6 +160,7 @@ saranjan (saranjan@cisco.com)
 Christian Schwede (info@cschwede.de)
 Mark Seger (Mark.Seger@hp.com)
 Andrew Clay Shafer (acs@parvuscaptus.com)
+Dhriti Shikhar (dhrish20@gmail.com)
 Chuck Short (chuck.short@canonical.com)
 Michael Shuler (mshuler@gmail.com)
 David Moreau Simard (dmsimard@iweb.com)
@@ -178,6 +180,7 @@ Rainer Toebbicke (Rainer.Toebbicke@cern.ch)
 Fujita Tomonori (fujita.tomonori@lab.ntt.co.jp)
 Nirmal Thacker (nirmalthacker@gmail.com)
 Kapil Thangavelu (kapil.foss@gmail.com)
+Nicolas Trangez (ikke@nicolast.be)
 Dean Troyer (dtroyer@gmail.com)
 Kota Tsuyuzaki (tsuyuzaki.kota@lab.ntt.co.jp)
 Dmitry Ukov (dukov@mirantis.com)

CHANGELOG

@@ -1,3 +1,62 @@
+swift (2.2.2)
+
+    * Data placement changes
+
+      This release has several major changes to data placement in Swift in
+      order to better handle different deployment patterns. First, with an
+      unbalance-able ring, less partitions will move if the movement doesn't
+      result in any better dispersion across failure domains. Also, empty
+      (partition weight of zero) devices will no longer keep partitions after
+      rebalancing when there is an unbalance-able ring.
+
+      Second, the notion of "overload" has been added to Swift's rings. This
+      allows devices to take some extra partitions (more than would normally
+      be allowed by the device weight) so that smaller and unbalanced clusters
+      will have less data movement between servers, zones, or regions if there
+      is a failure in the cluster.
+
+      Finally, rings have a new metric called "dispersion". This is the
+      percentage of partitions in the ring that have too many replicas in a
+      particular failure domain. For example, if you have three servers in a
+      cluster but two replicas for a partition get placed onto the same
+      server, that partition will count towards the dispersion metric. A
+      lower value is better, and the value can be used to find the proper
+      value for "overload".
+
+      The overload and dispersion metrics have been exposed in the
+      swift-ring-build CLI tools.
+
+      See http://docs.openstack.org/developer/swift/overview_ring.html
+      for more info on how data placement works now.
+
+    * Improve replication of large out-of-sync, out-of-date containers.
+
+    * Added console logging to swift-drive-audit with a new log_to_console
+      config option (default False).
+
+    * Optimize replication when a device and/or partition is specified.
+
+    * Fix dynamic large object manifests getting versioned. This was not
+      intended and did not work. Now it is properly prevented.
+
+    * Fix the GET's response code when there is a missing segment in a
+      large object manifest.
+
+    * Change black/white listing in ratelimit middleware to use sysmeta.
+      Instead of using the config option, operators can set
+      "X-Account-Sysmeta-Global-Write-Ratelimit: WHITELIST" or
+      "X-Account-Sysmeta-Global-Write-Ratelimit: BLACKLIST" on an account to
+      whitelist or blacklist it for ratelimiting. Note: the existing
+      config options continue to work.
+
+    * Use TCP_NODELAY on outgoing connections.
+
+    * Improve object-replicator startup time.
+
+    * Implement OPTIONS verb for storage nodes.
+
+    * Various other minor bug fixes and improvements.
+
 swift (2.2.1)
 
     * Swift now rejects object names with Unicode surrogates.