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Hudson commented on HDFS-5285: ------------------------------ SUCCESS: Integrated in Hadoop-Yarn-trunk #481 (See [https://builds.apache.org/job/Hadoop-Yarn-trunk/481/]) Move Flatten INode hierarchy jiras (HDFS-5531, HDFS-5285, HDFS-5286, HDFS-5537, HDFS-5554, HDFS-5647, HDFS-5632, HDFS-5715, HDFS-5726) to 2.4.0 section in CHANGES.txt (jing9: http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1568218) * /hadoop/common/trunk/hadoop-hdfs-project/hadoop-hdfs/CHANGES.txt > Flatten INodeFile hierarchy: Add UnderContruction Feature > --------------------------------------------------------- > > Key: HDFS-5285 > URL: https://issues.apache.org/jira/browse/HDFS-5285 > Project: Hadoop HDFS > Issue Type: Sub-task > Components: namenode > Reporter: Tsz Wo (Nicholas), SZE > Assignee: Jing Zhao > Fix For: 3.0.0, 2.4.0 > > Attachments: HDFS-5285.001.patch, HDFS-5285.002.patch, > HDFS-5285.003.patch, HDFS-5285.b2.patch, h5285_20131001.patch, > h5285_20131002.patch, h5285_20131118.patch > > > For files, there are INodeFile, INodeFileUnderConstruction, > INodeFileWithSnapshot and INodeFileUnderConstructionWithSnapshot for > representing whether a file is under construction or whether it is in some > snapshot. The following are two major problems of the current approach: > - Java class does not support multiple inheritances so that > INodeFileUnderConstructionWithSnapshot cannot extend both > INodeFileUnderConstruction and INodeFileWithSnapshot. > - The number of classes is exponential to the number of features. Currently, > there are only two features, UnderConstruction and WithSnapshot. The number > of classes is 2^2 = 4. It is hard to add one more feature since the number > of classes will become 2^3 = 8. > As a first step, we implement an Under-Construction feature to replace > INodeFileUnderConstruction and INodeFileUnderConstructionWithSnapshot in this > jira. -- This message was sent by Atlassian JIRA (v6.1.5#6160)