migrate 1.2 release notes

source/release-notes/1.2-changes.txt

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+:orphan:
+
+======================
+Changes in MongoDB 1.2
+======================
+
+.. toctree::
+
+   1.2

source/release-notes/1.2.txt

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+===============================
+Release Notes for MongoDB 1.2.x
+===============================
+
+.. default-domain:: mongodb
+
+.. contents:: See the :doc:`full index of this page <1.2-changes>` for
+              a complete list of changes included in 1.2.
+   :backlinks: none
+   :local:
+   :depth: 1
+
+New Features
+------------
+
+- More indexes per collection
+
+- Faster index creation
+
+- Map/Reduce
+
+- Stored JavaScript functions
+
+- Configurable fsync time
+
+- Several small features and fixes
+
+DB Upgrade Required
+-------------------
+
+There are some changes that will require doing an upgrade if your
+previous version is <= 1.0.x. If you're already using a version >= 1.1.x
+then these changes aren't required. There are 2 ways to do it:
+
+- ``--upgrade``
+
+  - stop your :program:`mongod` process
+
+  - run ``./mongod --upgrade``
+
+  - start :program:`mongod` again
+
+- use a slave
+
+  - start a slave on a different port and data directory
+
+  - when its synced, shut down the master, and start the new slave on
+    the regular port.
+
+Ask in the forums or IRC for more help.
+
+Replication Changes
+-------------------
+
+- There have been minor changes in replication. If you are upgrading a
+  master/slave setup from <= 1.1.2 you have to update the slave first.
+
+mongoimport
+-----------
+
+- ``mongoimportjson`` has been removed and is replaced with
+  :doc:`mongoimport </reference/mongoimport>` that can do json/csv/tsv
+
+field filter changing
+---------------------
+
+- We've changed the semantics of the field filter a little bit.
+  Previously only objects with those fields would be returned. Now the
+  field filter only changes the output, not which objects are returned.
+  If you need that behavior, you can use :doc:`$exists </reference/operator/exists>`