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Re: libhdfs portability - HDFS - [mail # dev]
...I believe that the WebHDFS API is your best bet for now. The current implementation of WebHDFSClient does not reuse the HTTP connections, which leads to a large part of the performance penal...
   Author: Haohui Mai, 2013-10-28, 23:14
[HDFS-5363] Refactor WebHdfsFileSystem: move SPENGO-authenticated connection creation to URLConnectionFactory - HDFS - [issue]
...Currently the WebHdfsSystem class creates the http connection of urls that require SPENGO authentication. This patch moves the above logic to URLConnectionFactory, which is the factory class...
http://issues.apache.org/jira/browse/HDFS-5363    Author: Haohui Mai, 2013-10-24, 15:05
[HDFS-5256] Use guava LoadingCache to implement DFSClientCache - HDFS - [issue]
...Google Guava provides an implementation of LoadingCache. Use the LoadingCache to implement DFSClientCache in NFS....
http://issues.apache.org/jira/browse/HDFS-5256    Author: Haohui Mai, 2013-10-23, 06:37
[HDFS-5379] Update links to datanode information in dfshealth.html - HDFS - [issue]
...Currently dfshealth.html already provides the information listed in dfsnodelist.jsp. The links to datanode information in dfshealth.html should be updated....
http://issues.apache.org/jira/browse/HDFS-5379    Author: Haohui Mai, 2013-10-18, 14:27
[HDFS-5278] Reduce memory consumptions of TestDFSClientRetries - HDFS - [issue]
...TestDFSClientRetries::testDFSClientRetriesOnBusyBlocks() spawns about 50 threads during the execution, each of which takes more than 6m memory.  It makes debugging it in eclipse under t...
http://issues.apache.org/jira/browse/HDFS-5278    Author: Haohui Mai, 2013-10-15, 23:31
[HDFS-5308] Replace HttpConfig#getSchemePrefix with implicit schemes in HDFS JSP - HDFS - [issue]
...The JSPs in HDFS calls HttpConfig.getSchemePrefix() to determine which scheme (http / https) to be put into the link. This can be done by putting "///" in the JSP instead, thus picking a sch...
http://issues.apache.org/jira/browse/HDFS-5308    Author: Haohui Mai, 2013-10-06, 15:15
[HDFS-5302] Use implicit schemes in jsp - HDFS - [issue]
...The JSPs in HDFS calls HttpConfig.getScheme() to determine which scheme (http / https) to be put into the link. This can be done by putting "///" in the JSP instead, thus picking a scheme ca...
http://issues.apache.org/jira/browse/HDFS-5302    Author: Haohui Mai, 2013-10-05, 00:42
[HDFS-5230] Introduce RpcInfo to decouple XDR classes from the RPC API - HDFS - [issue]
...The XDR class is one fundamental aspect in the current implementation of NFS server. While the client might potentially have a higher level APIs, it also requires redundant copying since the...
http://issues.apache.org/jira/browse/HDFS-5230    Author: Haohui Mai, 2013-10-01, 15:15
[HDFS-5265] Namenode fails to start when dfs.https.port is unspecified - HDFS - [issue]
...Namenode get the wrong address when dfs.https.port is unspecified.java.lang.IllegalArgumentException: Does not contain a valid host:port authority:      ...
http://issues.apache.org/jira/browse/HDFS-5265    Author: Haohui Mai, 2013-09-28, 14:46
[HDFS-5270] Use thread pools in the datenode daemons - HDFS - [issue]
...The current implementation of the datanode creates a thread when a new request comes in. This incurs high overheads for the creation / destruction of threads, making the datanode unstable un...
http://issues.apache.org/jira/browse/HDFS-5270    Author: Haohui Mai, 2013-09-28, 02:30
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