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[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-7717] Erasure Coding: provide a tool for convert files between replication and erasure coding - HDFS - [issue]
...We need a tool to do offline conversion between replication and erasure coding. The tool itself can either utilize MR just like the current distcp, or act like the balancer/mover....
http://issues.apache.org/jira/browse/HDFS-7717    Author: Jing Zhao, 2015-01-31, 00:30
[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-7622] Erasure Coding: handling file truncation - HDFS - [issue]
...This jira will cover the following issues: how to truncate an erasure coded file how to erasure code a file that has been truncated and snapshotted...
http://issues.apache.org/jira/browse/HDFS-7622    Author: Jing Zhao, 2015-01-15, 23:52
[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-7619] Erasure Coding: Handling files in snapshots - HDFS - [issue]
...Currently for files within snapshots, the file diff only records block list (before the truncate feature we only recorded file length). Now the file diff should also be able to capture the b...
http://issues.apache.org/jira/browse/HDFS-7619    Author: Jing Zhao, 2015-01-15, 23:06
[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
[HDFS-7509] Avoid resolving path multiple times - HDFS - [issue]
http://issues.apache.org/jira/browse/HDFS-7509    Author: Jing Zhao, 2014-12-17, 23:52
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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