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[HDFS-289] HDFS should blacklist datanodes that are not performing well - HDFS - [issue]
...On a large cluster, a few datanodes could be under-performing. There were cases when the network connectivity of a few of these bad datanodes were degraded, resulting in long long times (in ...
http://issues.apache.org/jira/browse/HDFS-289    Author: dhruba borthakur, 2014-07-30, 09:09
[HDFS-255] Create a user-guide for describing HDFS symlinks - HDFS - [issue]
...HADOOP-4044 introduces symlinks in HDFS. We need a user-guide (aka man-page) that describes the semantics of this new construct.....
http://issues.apache.org/jira/browse/HDFS-255    Author: dhruba borthakur, 2014-07-22, 21:41
[HDFS-269] Implement seek for HftpFileSystem - HDFS - [issue]
...Support seek in the HftpFileSystem. This is useful for a host of applications that need to access data from a hadoop cluster running a different version of hadoop....
http://issues.apache.org/jira/browse/HDFS-269    Author: dhruba borthakur, 2014-07-22, 20:53
[HDFS-220] Transparent archival and restore of files from HDFS - HDFS - [issue]
...There should be a facility to migrate old files away from a production cluster. Access to those files from applications should continue to work transparently, without changing application co...
http://issues.apache.org/jira/browse/HDFS-220    Author: dhruba borthakur, 2014-07-18, 23:45
[HDFS-233] Support for snapshots - HDFS - [issue]
...Support HDFS snapshots. It should support creating snapshots without shutting down the file system. Snapshot creation should be lightweight and a typical system should be able to support a f...
http://issues.apache.org/jira/browse/HDFS-233    Author: dhruba borthakur, 2014-07-18, 18:22
[HDFS-134] premature end-of-decommission of datanodes - HDFS - [issue]
...Decommissioning requires that the nodes be listed in the dfs.hosts.excludes file. The administrator runs the "dfsadmin -refreshNodes" command. The decommissioning process starts off. Suppose...
http://issues.apache.org/jira/browse/HDFS-134    Author: dhruba borthakur, 2014-07-18, 06:19
[HDFS-24] FSDataOutputStream should flush last partial CRC chunk - HDFS - [issue]
...The FSDataOutputSteam.flush() api is supposed to flush all data to the underlying stream. However, for LocalFileSystem, the flush APi does not flush the last partial CRC chunk.One solution i...
http://issues.apache.org/jira/browse/HDFS-24    Author: dhruba borthakur, 2014-07-17, 22:17
[HDFS-295] Update the "how to configure HDFS" documentation to include new features - HDFS - [issue]
...There has been lots of cases where HDFS administrators have enquired about setup and configuration of HDFS. A recent question asked about configuring Datanodes to understand the rack that it...
http://issues.apache.org/jira/browse/HDFS-295    Author: dhruba borthakur, 2014-07-17, 18:57
[HDFS-2699] Store data and checksums together in block file - HDFS - [issue]
...The current implementation of HDFS stores the data in one block file and the metadata(checksum) in another block file. This means that every read from HDFS actually consumes two disk iops, o...
http://issues.apache.org/jira/browse/HDFS-2699    Author: dhruba borthakur, 2014-04-17, 04:53
[HDFS-3544] Ability to use SimpleRegeratingCode to fix missing blocks - HDFS - [issue]
...ReedSolomon encoding (n, k) has n storage nodes and can tolerate n-k failures. Regenerating a block needs to access k blocks. This is a problem when n and k are large. Instead, we can use si...
http://issues.apache.org/jira/browse/HDFS-3544    Author: dhruba borthakur, 2014-01-20, 08:32
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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