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[HDFS-7769] TestHDFSCLI create files in hdfs project root dir - HDFS - [issue]
...After running TestHDFSCLI, two files (data and .data.crc) remain in hdfs project root dir....
http://issues.apache.org/jira/browse/HDFS-7769    Author: Tsz Wo Nicholas Sze, 2015-02-28, 15:32
[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, 2015-02-28, 15:32
[HDFS-7302] namenode -rollingUpgrade downgrade may finalize a rolling upgrade - HDFS - [issue]
...The namenode startup option "-rollingUpgrade downgrade" is originally designed for downgrading cluster.  However, running "namenode -rollingUpgrade downgrade" with the new software coul...
http://issues.apache.org/jira/browse/HDFS-7302    Author: Tsz Wo Nicholas Sze, 2015-02-26, 15:43
[HDFS-7843] A truncated file is corrupted after rollback from a rolling upgrade - HDFS - [issue]
...Here is a rolling upgrade truncate test from Brandon Li.  The basic test step is: (3 nodes cluster with HA)1. upload a file to hdfs2. start rollingupgrade. finish rollingupgrade for nam...
http://issues.apache.org/jira/browse/HDFS-7843    Author: Tsz Wo Nicholas Sze, 2015-02-26, 15:25
[HDFS-7849] Update documentation for enabling a new feature in rolling upgrade - HDFS - [issue]
...When there is a new feature in a new software, the new feature may not work correctly with the old software.  In such case, rolling upgrade should be done by the following steps: disabl...
http://issues.apache.org/jira/browse/HDFS-7849    Author: Tsz Wo Nicholas Sze, 2015-02-26, 03:20
[HDFS-7648] Verify the datanode directory layout - HDFS - [issue]
...HDFS-6482 changed datanode layout to use block ID to determine the directory to store the block.  We should have some mechanism to verify it.  Either DirectoryScanner or block repo...
http://issues.apache.org/jira/browse/HDFS-7648    Author: Tsz Wo Nicholas Sze, 2015-02-24, 06:57
[HDFS-7397] The conf key "dfs.client.read.shortcircuit.streams.cache.size" is misleading - HDFS - [issue]
...For dfs.client.read.shortcircuit.streams.cache.size, is it in MB or KB?  Interestingly, it is neither in MB nor KB.  It is the number of shortcircuit streams....
http://issues.apache.org/jira/browse/HDFS-7397    Author: Tsz Wo Nicholas Sze, 2015-02-24, 02:18
[HDFS-7721] The HDFS BlockScanner may run fast during the first hour - HDFS - [issue]
...https://builds.apache.org/job/PreCommit-HDFS-Build/9375//testReport/org.apache.hadoop.hdfs.server.datanode/TestBlockScanner/testScanRateLimit/ https://builds.apache.org/job/PreCommit-HDFS-Bu...
http://issues.apache.org/jira/browse/HDFS-7721    Author: Tsz Wo Nicholas Sze, 2015-02-17, 08:12
[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, 2015-02-09, 04:05
[HDFS-7738] Add more tests for truncate - HDFS - [issue]
...The following are negative test cases for truncate. new length > old length truncating a directory truncating a non-existing file truncating a file without write permission truncating a f...
http://issues.apache.org/jira/browse/HDFS-7738    Author: Tsz Wo Nicholas Sze, 2015-02-09, 00:15
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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