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[HDFS-4119] Complete the allowSnapshot code and add a test for it - HDFS - [issue]
...The major components of the code are already there.  We only have to connect them together and add a test for it....
http://issues.apache.org/jira/browse/HDFS-4119    Author: Tsz Wo, 2012-10-28, 20:03
[HDFS-4107] Add utility methods to cast INode to INodeFile and INodeFileUnderConstruction - HDFS - [issue]
...In the namenode code, there are many individual routines checking whether an inode is null and whether it could be cast to INodeFile/INodeFileUnderConstruction.  Let's add utility metho...
http://issues.apache.org/jira/browse/HDFS-4107    Author: Tsz Wo, 2012-10-26, 15:01
[HDFS-4092] Update file deletion logic to support snapshot files - HDFS - [issue]
...When snapshots are created, the blocks are shared among the snapshot files and the original file.  Deletion of the snapshot file or the original file does not necessarily lead to deleti...
http://issues.apache.org/jira/browse/HDFS-4092    Author: Tsz Wo, 2012-10-25, 20:33
[HDFS-4091] Add snapshot quota to limit the number of snapshots - HDFS - [issue]
...Once a directory has been set to snapshottable, users could create snapshots of the directories.  In this JIRA, we add a quota to snapshottable directories.  The quota is set by ad...
http://issues.apache.org/jira/browse/HDFS-4091    Author: Tsz Wo, 2012-10-24, 21:41
[HDFS-4099] Clean up replication code and add more javadoc - HDFS - [issue]
...FSNamesystem.checkReplicationFactor(..) should be combined with BlockManager.checkReplication(..). Add javadoc to the replication related method in BlockManager. Also clean up those methods....
http://issues.apache.org/jira/browse/HDFS-4099    Author: Tsz Wo, 2012-10-23, 15:01
[HDFS-4078] Handle replication in snapshots - HDFS - [issue]
...Without snapshots, file replication is the same as block replication.With snapshot, the file replication R_o of the original file and the file replication R_s of the snapshot file could poss...
http://issues.apache.org/jira/browse/HDFS-4078    Author: Tsz Wo, 2012-10-22, 19:51
[HDFS-4079] Add SnapshotManager - HDFS - [issue]
...SnapshotManager maintains a list for all the snapshottable directories in the namespace.  It also supports snapshot related methods such as setting a directory to snapshottable, creatin...
http://issues.apache.org/jira/browse/HDFS-4079    Author: Tsz Wo, 2012-10-21, 22:36
[HDFS-4088] Remove "throws QuotaExceededException" from an INodeDirectoryWithQuota constructor - HDFS - [issue]
...The constructor body does not throw QuotaExceededException.  We should remove it from the declaration....
http://issues.apache.org/jira/browse/HDFS-4088    Author: Tsz Wo, 2012-10-20, 15:01
[HDFS-4077] Support snapshottable INodeDirectory - HDFS - [issue]
...Allow INodeDirectory to be set to snapshottable INodeDirectory so that snapshots of the directory can be created....
http://issues.apache.org/jira/browse/HDFS-4077    Author: Tsz Wo, 2012-10-19, 23:31
[HDFS-4076] Support snapshot of single files - HDFS - [issue]
...The snapshot of a file shares the blocks with the original file in order to avoid copying data.  However, the snapshot file has its own metadata so that it could have independent permis...
http://issues.apache.org/jira/browse/HDFS-4076    Author: Tsz Wo, 2012-10-19, 20:40
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