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[HDFS-7416] Revisit the abstraction between NameNodeRpcServer, FSNameSystem and FSDirectory - HDFS - [issue]
...NameNodeRpcServer, FSNameSystem and FSDirectory implement the namespace of the NN. In the current implementation the boundary of these classes are not fully clear.This jira tracks the effort...
http://issues.apache.org/jira/browse/HDFS-7416    Author: Haohui Mai, 2014-11-20, 21:30
[HDFS-7406] SimpleHttpProxyHandler puts incorrect "Connection: Close" header - HDFS - [issue]
...tcpdump reveals that SimpleHttpProxyHandler puts incorrect values of the Connection header:Connection: io.netty.channel.ChannelFutureListener$1@36866933which should beConnection: close...
http://issues.apache.org/jira/browse/HDFS-7406    Author: Haohui Mai, 2014-11-19, 15:26
[HDFS-7404] Remove o.a.h.hdfs.server.datanode.web.resources - HDFS - [issue]
...After HDFS-7279 both DatanodeWebHdfsMethods and OpenEntity are dead. The jira proposes to remove them....
http://issues.apache.org/jira/browse/HDFS-7404    Author: Haohui Mai, 2014-11-18, 19:08
[HDFS-7279] Use netty to implement DatanodeWebHdfsMethods - HDFS - [issue]
...Currently the DN implements all related webhdfs functionality using jetty. As the current jetty version the DN used (jetty 6) lacks of fine-grained buffer and connection management, DN often...
http://issues.apache.org/jira/browse/HDFS-7279    Author: Haohui Mai, 2014-11-18, 15:29
[HDFS-7270] Implementing congestion control in writing pipeline - HDFS - [issue]
...When a client writes to HDFS faster than the disk bandwidth of the DNs, it  saturates the disk bandwidth and put the DNs unresponsive. The client only backs off by aborting / recovering...
http://issues.apache.org/jira/browse/HDFS-7270    Author: Haohui Mai, 2014-11-18, 01:29
[HDFS-5923] Do not persist the ACL bit in the FsPermission - HDFS - [issue]
...The current implementation persists and ACL bit in FSImage and editlogs. Moreover, the security decisions also depend on whether the bit is set.The problem here is that we have to maintain t...
http://issues.apache.org/jira/browse/HDFS-5923    Author: Haohui Mai, 2014-11-14, 17:55
[HDFS-5932] Ls should display the ACL bit - HDFS - [issue]
...Based on the discussion of HDFS-5923, the ACL bit is no longer passed to the client directly. Ls should call getAclStatus() instead since it needs to display the ACL bit as a part of the per...
http://issues.apache.org/jira/browse/HDFS-5932    Author: Haohui Mai, 2014-11-14, 17:55
[HDFS-7381] Decouple the management of block id and gen stamps from FSNamesystem - HDFS - [issue]
...The block layer should be responsible of managing block ids and generation stamps. Currently the functionality is misplace into FSNamesystem.This jira proposes to decouple them from the FSNa...
http://issues.apache.org/jira/browse/HDFS-7381    Author: Haohui Mai, 2014-11-13, 21:51
[HDFS-7375] Move FSClusterStats to o.a.h.h.hdfs.server.blockmanagement - HDFS - [issue]
...FSClusterStats is a private class that exports statistics for BlockPlacementPolicy. This jira proposes moving it to {{ o.a.h.h.hdfs.server.blockmanagement}} to simplify the code....
http://issues.apache.org/jira/browse/HDFS-7375    Author: Haohui Mai, 2014-11-12, 15:27
[HDFS-6757] Simplify lease manager with INodeID - HDFS - [issue]
...Currently the lease manager records leases based on path instead of inode ids. Therefore, the lease manager needs to carefully keep track of the path of active leases during renames and dele...
http://issues.apache.org/jira/browse/HDFS-6757    Author: Haohui Mai, 2014-11-11, 03:48
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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