[Hadoop Wiki] Update of "Hbase/HdfsSyncSupport" by EliCollins

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The "Hbase/HdfsSyncSupport" page has been changed by EliCollins.
http://wiki.apache.org/hadoop/Hbase/HdfsSyncSupport?action=diff&rev1=1&rev2=2

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  == What versions of HDFS support sync? ==
  
- The necessary feature is available in the ''0.20-append'' branch of HDFS, the unreleased ''0.21'' branch, and Cloudera's soon-to-be-released CDH3b2 release.
+ The necessary feature is available in the ''0.20-append'' branch of HDFS, the unreleased ''0.21'' branch, and Cloudera's CDH3 release  [https://docs.cloudera.com/display/DOC/HBase+Installation ].
  
  *NOTE:* Apache HDFS 0.20 does not support a working sync, even if the ''dfs.support.append'' flag is enabled. You *must* use one of the above versions of Hadoop to have durable edits in HBase.
  
  == How can I enable sync? ==
  
- To enable sync, first ensure that you have either compiled the 0.20-append branch from Apache, or installed Cloudera's CDH3b2. Then ensure that you have set the ''dfs.support.append'' flag to ''true'' in your ''hdfs-site.xml'' both in HDFS's configuration as well as HBase's.
+ To enable sync, first ensure that you have either compiled the 0.20-append branch from Apache, or installed Cloudera's CDH3. Then ensure that you have set the ''dfs.support.append'' flag to ''true'' in your ''hdfs-site.xml'' both in HDFS's configuration as well as HBase's.