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[HDFS-7845] Compress block reports - HDFS - [issue]
...We should optionally compress block reports using a low-cpu codec such as lz4 or snappy....
http://issues.apache.org/jira/browse/HDFS-7845    Author: Colin Patrick McCabe, 2015-02-28, 23:44
[HDFS-7817] libhdfs3: fix strerror_r detection - HDFS - [issue]
...The signature of strerror_r is not quite detected correctly in libhdfs3.  The code assumes that int foo = strerror_r will fail to compile with the GNU type signature, but this is not th...
http://issues.apache.org/jira/browse/HDFS-7817    Author: Colin Patrick McCabe, 2015-02-27, 06:18
[HDFS-7846] Create off-heap BlocksMap, BlockInfo, DataNodeInfo structures - HDFS - [issue]
...Create off-heap BlocksMap, BlockInfo, and DataNodeInfo structures.  The BlocksMap will use the off-heap hash table....
http://issues.apache.org/jira/browse/HDFS-7846    Author: Colin Patrick McCabe, 2015-02-26, 03:05
[HDFS-7844] Create an off-heap hash table implementation - HDFS - [issue]
...Create an off-heap hash table implementation....
http://issues.apache.org/jira/browse/HDFS-7844    Author: Colin Patrick McCabe, 2015-02-26, 03:04
[HDFS-7848] Use off-heap BlocksMap, BlockInfo, etc. in FSNamesystem - HDFS - [issue]
...Use off-heap BlocksMap, BlockInfo, etc. in FSNamesystem...
http://issues.apache.org/jira/browse/HDFS-7848    Author: Colin Patrick McCabe, 2015-02-26, 03:04
[HDFS-7847] Write a junit test to simulate a heavy BlockManager load - HDFS - [issue]
...Write a junit test to simulate a heavy BlockManager load.  Quantify native and java heap sizes, and some latency numbers....
http://issues.apache.org/jira/browse/HDFS-7847    Author: Colin Patrick McCabe, 2015-02-26, 03:03
[HDFS-7807] libhdfs htable.c: fix htable resizing, add unit test - HDFS - [issue]
...libhdfs htable.c: fix htable resizing, add unit test...
http://issues.apache.org/jira/browse/HDFS-7807    Author: Colin Patrick McCabe, 2015-02-24, 15:21
[HDFS-7693] libhdfs: add hdfsFile cache - HDFS - [issue]
...Add an hdfsFile cache inside libhdfs....
http://issues.apache.org/jira/browse/HDFS-7693    Author: Colin Patrick McCabe, 2015-02-20, 21:33
[HDFS-7430] Rewrite the BlockScanner to use O(1) memory and use multiple threads - HDFS - [issue]
...We should update the BlockScanner to use a constant amount of memory by keeping track of what block was scanned last, rather than by tracking the scan status of all blocks in memory.  A...
http://issues.apache.org/jira/browse/HDFS-7430    Author: Colin Patrick McCabe, 2015-02-17, 08:12
[HDFS-7744] Fix potential NPE in DFSInputStream after setDropBehind or setReadahead is called - HDFS - [issue]
...Fix a potential NPE in DFSInputStream after setDropBehind or setReadahead is called.  These functions clear the blockReader, but don't set blockEnd to -1, which could lead to DFSInputSt...
http://issues.apache.org/jira/browse/HDFS-7744    Author: Colin Patrick McCabe, 2015-02-17, 08:12
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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