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[HDFS-5589] Namenode loops caching and uncaching when data should be uncached - HDFS - [issue]
...This was reported by Chris Nauroth and Brandon Li, and Stephen Chu repro'd it too.If you add a new caching directive then remove it, the Namenode will sometimes get stuck in a loop where it ...
http://issues.apache.org/jira/browse/HDFS-5589    Author: Andrew Wang, 2014-01-10, 01:17
Re: persistent under-replicated blocks - HDFS - [mail # dev]
...Hi Chris,  BCC'ing hdfs-dev@ since you're using CDH, moving us to cdh-user@.  You should be able to manually copy the under-replicated blocks and md5 files to a different datanode ...
   Author: Andrew Wang, 2014-01-09, 21:56
[HDFS-5636] Enforce a max TTL per cache pool - HDFS - [issue]
...It'd be nice for administrators to be able to specify a maximum TTL for directives in a cache pool. This forces all directives to eventually age out....
http://issues.apache.org/jira/browse/HDFS-5636    Author: Andrew Wang, 2013-12-31, 14:45
[HDFS-5564] Refactor tests in TestCacheDirectives - HDFS - [issue]
...Some of the tests in TestCacheDirectives start their own MiniDFSCluster to get a new config, even though we already start a cluster in the @Before function. This contributes to longer test r...
http://issues.apache.org/jira/browse/HDFS-5564    Author: Andrew Wang, 2013-12-17, 21:09
[HDFS-5630] Hook up cache directive and pool usage statistics - HDFS - [issue]
...Right now we have stubs for bytes/files statistics for cache pools, but we need to hook them up so they're actually being tracked.This is a pre-requisite for enforcing per-pool quotas....
http://issues.apache.org/jira/browse/HDFS-5630    Author: Andrew Wang, 2013-12-06, 13:41
[HDFS-5551] Rename "path.based" caching configuration options - HDFS - [issue]
...Some configuration options still have the "path.based" moniker, missed during the big rename removing this naming convention....
http://issues.apache.org/jira/browse/HDFS-5551    Author: Andrew Wang, 2013-12-05, 21:03
[HDFS-5565] CacheAdmin help should match against non-dashed commands - HDFS - [issue]
...Using the shell, `hdfs dfsadmin -help refreshNamespace` returns help text, but for cacheadmin, you have to specify `hdfs cacheadmin -help -addDirective` with a dash before the command name. ...
http://issues.apache.org/jira/browse/HDFS-5565    Author: Andrew Wang, 2013-11-27, 13:27
[HDFS-5473] Consistent naming of user-visible caching classes and methods - HDFS - [issue]
...It's kind of warty that (after HDFS-5326 goes in) DistributedFileSystem has *CachePool methods take a CachePoolInfo and *PathBasedCacheDirective methods that thake a PathBasedCacheDirective....
http://issues.apache.org/jira/browse/HDFS-5473    Author: Andrew Wang, 2013-11-22, 13:27
[expand - 1 more] - Re: Metrics2 code - HDFS - [mail # dev]
...I'm not sure how Ganglia works, but I suspect that it's polling the metric every 10 seconds and taking the difference to give you the bytes written in the last 10 seconds, and divide that by...
   Author: Andrew Wang, 2013-11-21, 18:49
Re: issue about rpc activity metrics - HDFS - [mail # dev]
...The metrics system generates a number of different entries per in-code metrics object. For instance, the "SendHeartbeat"  MutableRate will generate both "NumOps" and "AvgTime". Look in ...
   Author: Andrew Wang, 2013-11-20, 17:00
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