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[HDFS-4103] Support O(1) snapshot creation - HDFS - [issue]
...In our first snapshot implementation, snapshot creation runs in O(N) and occupies O(N) memory space, where N = # files + # directories + # symlinks in the snapshot.  The advantages of t...
http://issues.apache.org/jira/browse/HDFS-4103    Author: Tsz Wo, 2012-12-27, 15:42
[HDFS-4317] Change INode to support HDFS-4103 - HDFS - [issue]
...This is a subtask separated from HDFS-4103: Change Diff to support undo. Add createSnapshotCopy() for inode Reorganize the INode and its subclasses constructors and some other methods....
http://issues.apache.org/jira/browse/HDFS-4317    Author: Tsz Wo, 2012-12-17, 13:29
[HDFS-4293] TestSnapshot fails - HDFS - [issue]
...After merged with trunk (r1419193), TestSnapshot fails.  We should also check other snapshot tests....
http://issues.apache.org/jira/browse/HDFS-4293    Author: Tsz Wo, 2012-12-11, 13:31
[HDFS-4112] A few improvements on INodeDirectory - HDFS - [issue]
...Below are a few improvements on INodeDirectory Add a utility method for casting from INode; avoid creating new empty list and INode arrays; renames getChildren() and getChildrenRaw(), rewrit...
http://issues.apache.org/jira/browse/HDFS-4112    Author: Tsz Wo, 2012-12-04, 23:44
[HDFS-4243] INodeDirectory.replaceChild(..) does not update parent - HDFS - [issue]
...The method replaces an existing child with a new child.  However, it does not take care the case the child also an INodeDirectory.  In such case, the parent pointers of the childre...
http://issues.apache.org/jira/browse/HDFS-4243    Author: Tsz Wo, 2012-12-04, 10:51
[HDFS-4242] Map.Entry is incorrectly used in LeaseManager - HDFS - [issue]
...As Daryn pointed out, the behavior of Map.Entry is undefined after the iteration or modifications of the map....
http://issues.apache.org/jira/browse/HDFS-4242    Author: Tsz Wo, 2012-12-01, 12:42
[HDFS-4125] Use a persistent data structure for snapshots - HDFS - [issue]
...There is a well-known data structure supporting O(1) snapshot creation, O(1) access slowdown, and O(1) modification space and time.See http://www.cs.cmu.edu/~sleator/papers/Persistence.htm...
http://issues.apache.org/jira/browse/HDFS-4125    Author: Tsz Wo, 2012-11-29, 22:56
[HDFS-1595] DFSClient may incorrectly detect datanode failure - HDFS - [issue]
...Suppose a source datanode S is writing to a destination datanode D in a write pipeline.  We have an implicit assumption that if S catches an exception when it is writing to D, then D is...
http://issues.apache.org/jira/browse/HDFS-1595    Author: Tsz Wo, 2012-11-28, 01:27
[HDFS-4204] TestNNThroughputBenchmark fails in branch-1 - HDFS - [issue]
...java.lang.StringIndexOutOfBoundsException: String index out of range: 0    at java.lang.String.charAt(String.java:686)    at org.apache.hadoop.net.NetUtils.norm...
http://issues.apache.org/jira/browse/HDFS-4204    Author: Tsz Wo, 2012-11-26, 19:50
[HDFS-4216] Adding symlink should not ignore QuotaExceededException - HDFS - [issue]
...FSDirectory.unprotectedSymlink(..) catches IOException and ignores it.  As a consequence it ignores QuotaExceededException....
http://issues.apache.org/jira/browse/HDFS-4216    Author: Tsz Wo, 2012-11-22, 13:23
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