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[HDFS-7131] During HA upgrade, JournalNode should create a new committedTxnId file in the current directory - HDFS - [issue]
...Currently while doing HA upgrade, we do not create a new committedTxnId file    in the new current directory of JournalNode. And before we have the fix in HDFS-7042, since the file...
http://issues.apache.org/jira/browse/HDFS-7131    Author: Jing Zhao, 2015-03-02, 16:55
[HDFS-7749] Erasure Coding: Add striped block support in INodeFile - HDFS - [issue]
...This jira plan to add a new INodeFile feature to store the stripped blocks information in case that the INodeFile is erasure coded....
http://issues.apache.org/jira/browse/HDFS-7749    Author: Jing Zhao, 2015-02-27, 21:22
[HDFS-7828] List variable length blocks in Fsck - HDFS - [issue]
...HDFS-3689 adds new functionalities to create blocks with variable length. It will be helpful to add functionality to fsck to list these blocks (i.e., blocks which are not the last block of a...
http://issues.apache.org/jira/browse/HDFS-7828    Author: Jing Zhao, 2015-02-24, 03:16
[HDFS-7743] Code cleanup of BlockInfo and rename BlockInfo to BlockInfoContiguous - HDFS - [issue]
...In the work of erasure coding (HDFS-7285), we plan to extend the class BlockInfo to two subclasses: BlockReplicationInfo and BlockGroupInfo (HDFS-7716). To ease the HDFS-EC branch syncing wi...
http://issues.apache.org/jira/browse/HDFS-7743    Author: Jing Zhao, 2015-02-17, 08:12
[HDFS-6420] DFSAdmin#refreshNodes should be sent to both NameNodes in HA setup - HDFS - [issue]
...Currently in HA setup (with logical URI), the DFSAdmin#refreshNodes command is sent to the NameNode first specified in the configuration by default. Users can use "-fs" option to specify whi...
http://issues.apache.org/jira/browse/HDFS-6420    Author: Jing Zhao, 2015-02-05, 19:18
[HDFS-7076] Persist Block Storage Policy in FSImage and Edit Log - HDFS - [issue]
...Currently block storage policies are hard coded.  This JIRA is to persist the policies in FSImage and Edit Log in order to support adding new policies or modifying existing policies....
http://issues.apache.org/jira/browse/HDFS-7076    Author: Jing Zhao, 2015-01-23, 06:38
[HDFS-7663] Erasure Coding: support Append on 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, 2015-01-23, 01:51
[HDFS-5080] BootstrapStandby not working with QJM when the existing NN is active - HDFS - [issue]
...Currently when QJM is used, running BootstrapStandby while the existing NN is active can get the following exception:FATAL ha.BootstrapStandby: Unable to read transaction ids 6175397-6175405...
http://issues.apache.org/jira/browse/HDFS-5080    Author: Jing Zhao, 2015-01-22, 21:14
[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, 2015-01-15, 23:11
[HDFS-6423] Diskspace quota usage should be updated when appending data to partial block - HDFS - [issue]
...When appending new data to a file whose last block is a partial block, the diskspace quota usage is not correctly update. For example, suppose the block size is 1024 bytes, and a file has si...
http://issues.apache.org/jira/browse/HDFS-6423    Author: Jing Zhao, 2015-01-06, 20:22
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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