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[HDFS-5556] add some more NameNode cache statistics, cache pool stats - HDFS - [issue]
...Add some more NameNode cache statistics and also cache pool statistics....
http://issues.apache.org/jira/browse/HDFS-5556    Author: Colin Patrick McCabe, 2013-11-28, 13:40
[HDFS-4817] make HDFS advisory caching configurable on a per-file basis - HDFS - [issue]
...HADOOP-7753 and related JIRAs introduced some performance optimizations for the DataNode.  One of them was readahead.  When readahead is enabled, the DataNode starts reading the ne...
http://issues.apache.org/jira/browse/HDFS-4817    Author: Colin Patrick McCabe, 2013-11-27, 21:00
[HDFS-5543] fix narrow race condition in TestPathBasedCacheRequests - HDFS - [issue]
...TestPathBasedCacheRequests has a narrow race condition in testWaitForCachedReplicasInDirectory where an assert checking the number of bytes cached may fail.  The reason is because waitF...
http://issues.apache.org/jira/browse/HDFS-5543    Author: Colin Patrick McCabe, 2013-11-22, 13:27
[HDFS-5451] Add byte and file statistics to PathBasedCacheEntry - HDFS - [issue]
...It would be nice to have message at DEBUG level that described all the decisions we made for cache entries.  That way we could turn on this debugging to get more information.  We s...
http://issues.apache.org/jira/browse/HDFS-5451    Author: Colin Patrick McCabe, 2013-11-21, 13:27
[HDFS-5511] improve CacheManipulator interface to allow better unit testing - HDFS - [issue]
...The CacheManipulator interface has been helpful in allowing us to stub out mlock in cases where we don't want to test it.  We should move  the getMemlockLimit and getOperatingSyste...
http://issues.apache.org/jira/browse/HDFS-5511    Author: Colin Patrick McCabe, 2013-11-20, 13:27
[HDFS-5520] loading cache path directives from edit log doesn't update nextEntryId - HDFS - [issue]
...Loading cache path directives from edit log doesn't update nextEntryId.  We need to update this to avoid reusing directive IDs....
http://issues.apache.org/jira/browse/HDFS-5520    Author: Colin Patrick McCabe, 2013-11-19, 13:38
[HDFS-5366] recaching improvements - HDFS - [issue]
...There are a few things about our HDFS-4949 recaching strategy that could be improved. We should monitor the DN's maximum and current mlock'ed memory consumption levels, so that we don't ask ...
http://issues.apache.org/jira/browse/HDFS-5366    Author: Colin Patrick McCabe, 2013-11-15, 19:10
[HDFS-5450] better API for getting the cached blocks locations - HDFS - [issue]
...Currently, we have to downcast the BlockLocation to HdfsBlockLocation to get information about whether a replica is cached.  We should have this information in BlockLocation instead....
http://issues.apache.org/jira/browse/HDFS-5450    Author: Colin Patrick McCabe, 2013-11-13, 13:47
[HDFS-5485] add command-line support for modifyDirective - HDFS - [issue]
...add command-line support for modifyDirective...
http://issues.apache.org/jira/browse/HDFS-5485    Author: Colin Patrick McCabe, 2013-11-13, 13:47
[HDFS-5326] add modifyDirective to cacheAdmin - HDFS - [issue]
...We should add a way of modifying cache directives on the command-line, similar to how modifyCachePool works....
http://issues.apache.org/jira/browse/HDFS-5326    Author: Colin Patrick McCabe, 2013-11-09, 06:32
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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