In the latest version of the documentation (http://hadoop.apache.org/docs/current2/hadoop-project-dist/hadoop-hdfs/Hdfs Design.html#Simple_Coherency_Model and also documentation for version 2.x), it's mentioned that "A file once created, written, and closed need not be changed. " and "There is a plan to support appending-writes to files in the future."
However, as far as I know, HDFS has supported append write since 0.21, based on this JIRA (https://issues.apache.org/jira/browse/HDFS-265) and the old version of the documentation in 2012 (https://web.archive.org/web/20121221171824/http://hadoop.apache.org/docs/hd fs/current/hdfs_design.html#Appending-Writes+and+File+Syncs <https://web.archive.org/web/20121221171824/http:/hadoop.apache.org/docs/hdf s/current/hdfs_design.html#Appending-Writes+and+File+Syncs> ) Various posts on the Internet also suggests that append write has been available in HDFS, and will always be available in Hadoop version 2 branch. Can we update the documentation to reflect the most recent change? (Or will append write be deprecated or is it not ready for production use?)
