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[HADOOP-7344] globStatus doesn't grok groupings with a slash - Hadoop - [issue]
...If a glob contains a grouping with a single item that contains a slash, ex. "{a/b}", then globStatus throws "Illegal file pattern: Unclosed group near index 2" – regardless of whether ...
http://issues.apache.org/jira/browse/HADOOP-7344    Author: Daryn Sharp, 2014-02-24, 20:58
Re: HDFS Federation address performance issue - Hadoop - [mail # user]
...Hi Anfernee,You will achieve improved performance with federation only if you stripe files across the multiple NNs.  Federation basically shares DN storage with multiple NNs with the ex...
   Author: Daryn Sharp, 2014-01-28, 18:54
[HADOOP-10233] RPC lacks output flow control - Hadoop - [issue]
...The RPC layer has input flow control via the callq, however it lacks any output flow control.  A handler will try to directly send the response.  If the full response is not sent t...
http://issues.apache.org/jira/browse/HADOOP-10233    Author: Daryn Sharp, 2014-01-14, 23:48
[HADOOP-10173] Remove UGI from DIGEST-MD5 SASL server creation - Hadoop - [issue]
...Instantiation of SASL server instances within the readers threads is performed within a UGI.getCurrentUser().doAs.  getCurrentUser is synchronized, and doAs also degrades performance. &...
http://issues.apache.org/jira/browse/HADOOP-10173    Author: Daryn Sharp, 2014-01-03, 14:47
[HADOOP-10172] Cache SASL server factories - Hadoop - [issue]
...Performance for SASL server creation is atrocious.  Sasl.createSaslServer does not cache the provider resolution for the factories.  Factory resolution and server instantiation has...
http://issues.apache.org/jira/browse/HADOOP-10172    Author: Daryn Sharp, 2013-12-20, 15:09
[HADOOP-10174] Run RPC server within the Subject that instantiated it - Hadoop - [issue]
...RPC servers would not require as many doAs blocks if the server threads run within the access control context that instantiates the server....
http://issues.apache.org/jira/browse/HADOOP-10174    Author: Daryn Sharp, 2013-12-17, 19:24
Re: How can I get FSNamesystem of running NameNode in cluster? - Hadoop - [mail # dev]
...Are you adding something internal to the NN?  If not, you cannot get the namesystem instance via a client unless you are using a minicluster object.  Daryn  On Dec 9, 2013, at...
   Author: Daryn Sharp, 2013-12-09, 14:42
[HADOOP-10099] Reduce chance for RPC denial of service - Hadoop - [issue]
...A RPC server may accept an unlimited number of connections unless indirectly bounded by a blocking operation in the RPC handler threads.  The NN's namespace locking happens to cause thi...
http://issues.apache.org/jira/browse/HADOOP-10099    Author: Daryn Sharp, 2013-11-14, 19:28
Re: [VOTE] Release Apache Hadoop 2.2.0 - Hadoop - [mail # dev]
...+1  I did some basic testing and it appears to work fine.  Daryn  On Oct 7, 2013, at 2:00 AM, Arun C Murthy wrote:  ...
   Author: Daryn Sharp, 2013-10-07, 15:28
[HADOOP-10014] Symlink resolution is fundamentally broken for multi-layered filesystems - Hadoop - [issue]
...Symlink resolution is performed on a per-filesystem basis.  In a multi-layered filesystem, the symlinks need to be resolved relative to the highest level filesystem in the stack.  ...
http://issues.apache.org/jira/browse/HADOOP-10014    Author: Daryn Sharp, 2013-10-04, 17:34
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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