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[HDFS-7285] Erasure Coding Support inside HDFS - HDFS - [issue]
...Erasure Coding (EC) can greatly reduce the storage overhead without sacrifice of data reliability, comparing to the existing HDFS 3-replica approach. For example, if we use a 10+4 Reed Solom...
http://issues.apache.org/jira/browse/HDFS-7285    Author: Weihua Jiang, 2014-10-30, 00:17
[HDFS-2832] Enable support for heterogeneous storages in HDFS - DN as a collection of storages - HDFS - [issue]
...HDFS currently supports configuration where storages are a list of directories. Typically each of these directories correspond to a volume with its own file system. All these directories are...
http://issues.apache.org/jira/browse/HDFS-2832    Author: Suresh Srinivas, 2014-10-30, 00:13
[HDFS-7281] Missing block is marked as corrupted block - HDFS - [issue]
...In the situation where the block lost all its replicas, fsck shows the block is missing as well as corrupted. Perhaps it is better not to mark the block corrupted in this case. The reason it...
http://issues.apache.org/jira/browse/HDFS-7281    Author: Ming Ma, 2014-10-30, 00:05
[HDFS-503] Implement erasure coding as a layer on HDFS - HDFS - [issue]
...The goal of this JIRA is to discuss how the cost of raw storage for a HDFS file system can be reduced. Keeping three copies of the same data is very costly, especially when the size of stora...
http://issues.apache.org/jira/browse/HDFS-503    Author: dhruba borthakur, 2014-10-29, 22:33
[HDFS-7308] DFSClient write packet size may > 64kB - HDFS - [issue]
...In DFSOutputStream.computePacketChunkSize(..),  private void computePacketChunkSize(int psize, int csize) {    final int chunkSize = csize + getChecksumSize(); ...
http://issues.apache.org/jira/browse/HDFS-7308    Author: Tsz Wo Nicholas Sze, 2014-10-29, 22:11
[HDFS-7307] Need 'force close' - HDFS - [issue]
...Until HDFS-4882 and HDFS-7306 get real fixes, operations teams need a way to force close files.  DNs are essentially held hostage by broken clients that never close.  This situatio...
http://issues.apache.org/jira/browse/HDFS-7307    Author: Allen Wittenauer, 2014-10-29, 21:39
[HDFS-7306] can't decommission w/under construction blocks - HDFS - [issue]
...We need a way to decommission a node with open blocks.  Now that HDFS supports append, this should be do-able....
http://issues.apache.org/jira/browse/HDFS-7306    Author: Allen Wittenauer, 2014-10-29, 21:39
[HDFS-7097] Allow block reports to be processed during checkpointing on standby name node - HDFS - [issue]
...On a reasonably busy HDFS cluster, there are stream of creates, causing data nodes to generate incremental block reports.  When a standby name node is checkpointing, RPC handler threads...
http://issues.apache.org/jira/browse/HDFS-7097    Author: Kihwal Lee, 2014-10-29, 20:31
[HDFS-6584] Support Archival Storage - HDFS - [issue]
...In most of the Hadoop clusters, as more and more data is stored for longer time, the demand for storage is outstripping the compute. Hadoop needs a cost effective and easy to manage solution...
http://issues.apache.org/jira/browse/HDFS-6584    Author: Tsz Wo Nicholas Sze, 2014-10-29, 19:54
[HDFS-7279] Use netty to implement DatanodeWebHdfsMethods - HDFS - [issue]
...Currently the DN implements all related webhdfs functionality using jetty. As the current jetty version the DN used (jetty 6) lacks of fine-grained buffer and connection management, DN often...
http://issues.apache.org/jira/browse/HDFS-7279    Author: Haohui Mai, 2014-10-29, 18:14
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