[15/32] git commit: Add README for yarn modules

[pw...@apache.org]

Add README for yarn modules


Project: http://git-wip-us.apache.org/repos/asf/incubator-spark/repo
Commit: http://git-wip-us.apache.org/repos/asf/incubator-spark/commit/67cd752e
Tree: http://git-wip-us.apache.org/repos/asf/incubator-spark/tree/67cd752e
Diff: http://git-wip-us.apache.org/repos/asf/incubator-spark/diff/67cd752e

Branch: refs/heads/master
Commit: 67cd752e746bf2c2202949e15dbb85faf8e3c482
Parents: e867e31
Author: Raymond Liu <ra...@intel.com>
Authored: Fri Dec 6 10:26:59 2013 +0800
Committer: Raymond Liu <ra...@intel.com>
Committed: Fri Jan 3 12:12:38 2014 +0800

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 yarn/README.md | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)
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http://git-wip-us.apache.org/repos/asf/incubator-spark/blob/67cd752e/yarn/README.md
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diff --git a/yarn/README.md b/yarn/README.md
new file mode 100644
index 0000000..3639f2c
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+# YARN DIRECTORY LAYOUT
+
+Hadoop Yarn related code are organized 
+
+Hadoop Yarn related codes are organized in separate modules with layered dependency.
+
+ * common : Common codes that will be called into by other modules.
+
+ * 2.0 / 2.2 : Codes that involve specific version of Hadoop YARN API. Depends on common module.
+
+  2.0 actually represents  0.23 and 2.0
+  2.2 actually represents 2.2 and later, until the API is break again.
+
+ * Scheduler : Implementation of various YARN Scheduler and backend. Depends on 2.0 / 2.2 modules.
+ * Assembly : For maven build to assembly all other modules in Yarn into one single jar.
+