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[HDFS-5323] Remove some deadcode in BlockManager - HDFS - [issue]
...BlockManager#DEFAULT_MAP_LOAD_FACTOR is deadcode.  It no longer does anything since blocks are now stored in a GSet whose size is fixed.BlocksMap#blocks does not need to be volatile. &n...
http://issues.apache.org/jira/browse/HDFS-5323    Author: Colin Patrick McCabe, 2013-10-10, 15:19
[HDFS-5314] Do not expose CachePool type in AddCachePoolOp - HDFS - [issue]
...CachePool is an internal type which should not be exposed or used in the FSEditLog.  Because CachePool is mutable, storing a reference to it in an edit log operation could lead to the e...
http://issues.apache.org/jira/browse/HDFS-5314    Author: Colin Patrick McCabe, 2013-10-07, 23:10
[HDFS-5119] Persist CacheManager state in the edit log - HDFS - [issue]
...CacheManager state should be persisted in the edit log.  At the moment, this state consists of information about cache pools and cache directives.  It's not necessary to persist an...
http://issues.apache.org/jira/browse/HDFS-5119    Author: Colin Patrick McCabe, 2013-10-06, 23:22
[HDFS-5190] Move cache pool related CLI commands to CacheAdmin - HDFS - [issue]
...As per the discussion in HDFS-5158, we should move the cache pool add, remove, list commands into cacheadmin.  We also should write a unit test in TestHDFSCLI for these commands....
http://issues.apache.org/jira/browse/HDFS-5190    Author: Colin Patrick McCabe, 2013-10-04, 23:28
[HDFS-5191] revisit zero-copy API in FSDataInputStream to make it more intuitive - HDFS - [issue]
...As per the discussion on HDFS-4953, we should revisit the zero-copy API to make it more intuitive for new users....
http://issues.apache.org/jira/browse/HDFS-5191    Author: Colin Patrick McCabe, 2013-09-26, 21:35
[HDFS-4521] invalid network topologies should not be cached - HDFS - [issue]
...When the network topology is invalid, the DataNode refuses to start with a message such as this:org.apache.hadoop.hdfs.server.protocol.DatanodeProtocol.registerDatanode from 172.29.122.23:55...
http://issues.apache.org/jira/browse/HDFS-4521    Author: Colin Patrick McCabe, 2013-09-24, 08:51
[HDFS-4522] LightWeightGSet expects incrementing a volatile to be atomic - HDFS - [issue]
...LightWeightGSet uses a volatile integer to track the current modification number (kind of an epoch number).Unfortunately, it includes code like this, that increments this volatile int: ...
http://issues.apache.org/jira/browse/HDFS-4522    Author: Colin Patrick McCabe, 2013-09-23, 17:51
[HDFS-5053] NameNode should invoke DataNode APIs to coordinate caching - HDFS - [issue]
...The NameNode should invoke the DataNode APIs to coordinate caching....
http://issues.apache.org/jira/browse/HDFS-5053    Author: Colin Patrick McCabe, 2013-09-14, 01:23
[HDFS-5201] NativeIO: consolidate getrlimit into NativeIO#getMemlockLimit - HDFS - [issue]
...Let's consolidate NativeIO#POSIX#getrlimit into NativeIO#getMemlockLimit.  This avoids a few issues with the current function: it is not available on Windows, it relied on Linux-specifi...
http://issues.apache.org/jira/browse/HDFS-5201    Author: Colin Patrick McCabe, 2013-09-14, 01:22
[HDFS-5198] NameNodeRpcServer must not send back DNA_FINALIZE in reply to a cache report - HDFS - [issue]
...NameNodeRpcServer must not send back a DNA_FINALIZE command in reply to a cache report.  DNA_FINALIZE instructs the DN to complete an upgrade process-- not something we need or want for...
http://issues.apache.org/jira/browse/HDFS-5198    Author: Colin Patrick McCabe, 2013-09-13, 21:43
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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