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[HDFS-7344] Erasure Coding worker and support in DataNode - HDFS - [issue]
...According to HDFS-7285 and the design, this handles DataNode side extension and related support for Erasure Coding, and implements ECWorker. It mainly covers the following aspects, and separ...
http://issues.apache.org/jira/browse/HDFS-7344    Author: Kai Zheng, 2015-03-25, 12:24
[HDFS-7793] Refactor DFSOutputStream separating DataStreamer out - HDFS - [issue]
...As proposed by Jing Zhao, Tsz Wo Nicholas Sze and discussed with Zhe Zhang in HDFS-7729, it would be great to refactor DFSOutputStream first and separate DataStreamer out of it, before we en...
http://issues.apache.org/jira/browse/HDFS-7793    Author: Kai Zheng, 2015-03-05, 04:19
[HDFS-7866] Erasure coding: Allow NameNode to load, list and sync predefined EC schemas - HDFS - [issue]
...This is to extend NameNode to load, list and sync predefine EC schemas in authorized and controlled approach. The provided facilities will be used to implement DFSAdmin commands so admin can...
http://issues.apache.org/jira/browse/HDFS-7866    Author: Kai Zheng, 2015-03-02, 08:56
[HDFS-7371] Loading predefined EC schemas from configuration - HDFS - [issue]
...System administrator can configure multiple EC codecs in hdfs-site.xml file, and codec instances or schemas in a new configuration file named ec-schema.xml in the conf folder. A codec can be...
http://issues.apache.org/jira/browse/HDFS-7371    Author: Kai Zheng, 2015-03-02, 08:56
[HDFS-7859] Erasure Coding: Persist EC schemas in NameNode - HDFS - [issue]
...In meetup discussion with Zhe Zhang and Jing Zhao, it's suggested that we persist EC schemas in NameNode centrally and reliably, so that EC zones can reference them by name efficiently....
http://issues.apache.org/jira/browse/HDFS-7859    Author: Kai Zheng, 2015-03-02, 08:55
[HDFS-7699] Erasure Codec API covering the essential aspects for an erasure code - HDFS - [issue]
...This is to define the even higher level API ErasureCodec to possiblly consider all the essential aspects for an erasure code, as discussed in in HDFS-7337 in details. Generally, it will cove...
http://issues.apache.org/jira/browse/HDFS-7699    Author: Kai Zheng, 2015-02-27, 22:59
[HDFS-7664] Reed-Solomon ErasureCoder - HDFS - [issue]
...This is to implement Reed-Solomon ErasureCoder using the API defined in HDFS-7662. It supports to plugin via configuration for concrete RawErasureCoder, using either JRSErasureCoder added in...
http://issues.apache.org/jira/browse/HDFS-7664    Author: Kai Zheng, 2015-02-12, 09:35
[HDFS-7662] Erasure Coder API for encoding and decoding of block group - HDFS - [issue]
...This is to define ErasureCoder API for encoding and decoding of BlockGroup. Given a BlockGroup, ErasureCoder extracts data chunks from the blocks and leverages RawErasureCoder defined in HDF...
http://issues.apache.org/jira/browse/HDFS-7662    Author: Kai Zheng, 2015-02-11, 22:04
[HDFS-7418] Raw Reed-Solomon coder in pure Java - HDFS - [issue]
...This will implement RS coder by porting existing codes in HDFS-RAID in the new codec and coder framework, which could be useful in case native support isn't available or convenient in some e...
http://issues.apache.org/jira/browse/HDFS-7418    Author: Kai Zheng, 2015-02-03, 09:25
[HDFS-7417] Raw XOR coder - HDFS - [issue]
...This will implement XOR codes by porting the codes from HDFS-RAID. The coder in the algorithm is needed by some high level codecs like LRC....
http://issues.apache.org/jira/browse/HDFS-7417    Author: Kai Zheng, 2015-02-03, 09:24
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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