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[HDFS-4978] Make disallowSnapshot idempotent - HDFS - [issue]
...Currently disallowSnapshot is not idempotent: an exception will be thrown when the directory is already non-snapshottable. This jira tries to make it idempotent....
http://issues.apache.org/jira/browse/HDFS-4978    Author: Jing Zhao, 2013-07-12, 15:09
Re: Regarding hsync - HDFS - [mail # dev]
...Hi Hemant,      HDFS-4213 (https://issues.apache.org/jira/browse/HDFS-4213) may be the one you're looking for. In general, an hsync which can update the file size on NN is ena...
   Author: Jing Zhao, 2013-07-11, 17:12
[HDFS-4877] Snapshot: fix the scenario where a directory is renamed under its prior descendant - HDFS - [issue]
...Suppose we have the following operations:1. rename /dir1/foo/bar to /dir2/bar22. rename /dir1/foo to /dir2/bar2/foo2I.e., we rename a directory (foo) to a child of its prior descendant (bar)...
http://issues.apache.org/jira/browse/HDFS-4877    Author: Jing Zhao, 2013-06-06, 21:30
[HDFS-4863] The root directory should be added to the snapshottable directory list while loading fsimage - HDFS - [issue]
...When the root directory is set as snapshottable, its snapshot quota is changed from 0 to a positive number. While loading fsimage we should check the root's snapshot quota and add it to snap...
http://issues.apache.org/jira/browse/HDFS-4863    Author: Jing Zhao, 2013-05-31, 06:14
[HDFS-4842] Snapshot: identify the correct prior snapshot when deleting a snapshot under a renamed subtree - HDFS - [issue]
...In our long-term running tests for snapshot we find the following bug:1. initially we have directories /test, /test/dir1 and /test/dir2/foo. 2. first take snapshot s0 and s1 on /test.3. modi...
http://issues.apache.org/jira/browse/HDFS-4842    Author: Jing Zhao, 2013-05-31, 06:03
[HDFS-4791] Update and fix deletion of reference inode - HDFS - [issue]
...Currently for deleting or destroying a reference node, we directly call the corresponding methods of the referred inode, and patch code for extra clean after deletion. This jira will revisit...
http://issues.apache.org/jira/browse/HDFS-4791    Author: Jing Zhao, 2013-05-22, 23:12
[HDFS-4479] logSync() with the FSNamesystem lock held in commitBlockSynchronization - HDFS - [issue]
...In FSNamesystem#commitBlockSynchronization of branch-1, logSync() may be called when the FSNamesystem lock is held. Similar to HDFS-4186, this may cause some performance issue.The following ...
http://issues.apache.org/jira/browse/HDFS-4479    Author: Jing Zhao, 2013-05-15, 06:16
[HDFS-4809] Add more unit tests for the undo section of rename - HDFS - [issue]
...1. Add more unit tests for the undo section of rename2. Fix a bug in FSDirectory#addChild: if a QuotaExceededException is thrown in parent.addChild(child, true, iip.getLatestSnapshot(), inod...
http://issues.apache.org/jira/browse/HDFS-4809    Author: Jing Zhao, 2013-05-09, 14:08
[HDFS-4806] For an INodeDirectoryWithSnapshot, use INode#isInLatestSnapshot() to check if the added/removed child should be recorded in snapshot diff - HDFS - [issue]
...Before supporting rename with snapshots, when adding/remove a child inode to/from a directory, if the directory is already an INodeDirectoryWithSnapshot, we can directly record the change in...
http://issues.apache.org/jira/browse/HDFS-4806    Author: Jing Zhao, 2013-05-08, 14:08
[HDFS-4800] Fix INodeDirectoryWithSnapshot#cleanDeletedINode - HDFS - [issue]
...HDFS-4791 updated and fixed the deletion logic for reference node, but did not update INodeDirectoryWithSnapshot#cleanDeletedINode. When deleting a snapshot s, after we merge s1 to its prior...
http://issues.apache.org/jira/browse/HDFS-4800    Author: Jing Zhao, 2013-05-07, 14:13
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB