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[HDFS-7663] Erasure Coding: support Append on stripping EC file - HDFS - [issue]
...Append should be easy if we have variable length block support from HDFS-3689, i.e., the new data will be appended to a new block. We need to revisit whether and how to support appending dat...
http://issues.apache.org/jira/browse/HDFS-7663    Author: Jing Zhao, 2015-05-05, 12:21
[HDFS-7621] Erasure Coding: update the Balancer/Mover data migration logic - HDFS - [issue]
...Currently the Balancer/Mover only considers the distribution of replicas of the same block during data migration: the migration cannot decrease the number of racks. With EC the Balancer and ...
http://issues.apache.org/jira/browse/HDFS-7621    Author: Jing Zhao, 2015-05-05, 03:57
[HDFS-8281] Erasure Coding: implement parallel stateful reading for striped layout - HDFS - [issue]
...This jira aims to support parallel reading for stateful read in DFSStripedInputStream....
http://issues.apache.org/jira/browse/HDFS-8281    Author: Jing Zhao, 2015-05-05, 01:26
[HDFS-8319] Erasure Coding: support decoding for stateful read - HDFS - [issue]
...HDFS-7678 adds the decoding functionality for pread. This jira plans to add decoding to stateful read....
http://issues.apache.org/jira/browse/HDFS-8319    Author: Jing Zhao, 2015-05-04, 22:57
[HDFS-8300] Fix unit test failures and findbugs warning caused by HDFS-8283 - HDFS - [issue]
...findbugs warningClass org.apache.hadoop.hdfs.DataStreamer$LastException is not derived from an Exception, even though it is named as such unit test failuressee https://builds.apache.org/job/...
http://issues.apache.org/jira/browse/HDFS-8300    Author: Jing Zhao, 2015-05-01, 16:40
[HDFS-8308] Erasure Coding: NameNode may get blocked in waitForLoadingFSImage() when loading editlog - HDFS - [issue]
...If the editlog contains a transaction for creating an EC file, the NN will get blocked in waitForLoadingFSImage because the following call path:FSDirectory#addFileForEditLog --> FSDirecto...
http://issues.apache.org/jira/browse/HDFS-8308    Author: Jing Zhao, 2015-05-01, 03:43
[HDFS-8272] Erasure Coding: simplify the retry logic in DFSStripedInputStream (stateful read) - HDFS - [issue]
...Currently in DFSStripedInputStream the retry logic is still the same with DFSInputStream. More specifically, every failed read will try to search for another source node. And an exception is...
http://issues.apache.org/jira/browse/HDFS-8272    Author: Jing Zhao, 2015-04-30, 01:48
[HDFS-8293] Erasure Coding: test the retry logic of DFSStripedInputStream - HDFS - [issue]
...In DFSStripedInputStream/DFSInputStream we retry the reading sometimes to refetch token or encryption key. This jira plans to add more tests for it....
http://issues.apache.org/jira/browse/HDFS-8293    Author: Jing Zhao, 2015-04-30, 01:47
[HDFS-8273] FSNamesystem#Delete() should not call logSync() when holding the lock - HDFS - [issue]
...HDFS-7573 moves the logSync call inside of the write lock by accident. We should move it out....
http://issues.apache.org/jira/browse/HDFS-8273    Author: Jing Zhao, 2015-04-29, 19:14
[HDFS-8280] Code Cleanup in DFSInputStream - HDFS - [issue]
...This is some code cleanup separate from HDFS-8272: Avoid duplicated block reader creation code If no new source DN can be found, getBestNodeDNAddrPair returns null instead of throwing Except...
http://issues.apache.org/jira/browse/HDFS-8280    Author: Jing Zhao, 2015-04-29, 16:34
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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