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[HDFS-2124] Namenode HA using Backup Namenode as Hot Standby - HDFS - [issue]
...This is to share our experiences on building Automatic, Hot High Availability for Namenode, leveraging the existing Backup Namenode....
http://issues.apache.org/jira/browse/HDFS-2124    Author: Justin Joseph, 2013-02-22, 11:11
[HDFS-2166] Datanodes should send block reports to both Active and Standby Namenodes. - HDFS - [issue]
...Datanode should send the Block Reports and Block Received commands to both Active and Standby Namenodes. It substantially reduces the time for Standby to take over as Active and enhances the...
http://issues.apache.org/jira/browse/HDFS-2166    Author: Justin Joseph, 2013-02-22, 11:09
[HDFS-2165] The Intelligent Clients should switch dynamically according to the Namenode switchover & the operations that fail during the switching should be retried on the newly Active Namenode. - HDFS - [issue]
...Here we consider DataNode and DFSClient as clients to the Namenode. When Active Namenode goes down and Standby takes over the role, the clients should understand it and communicate to the ne...
http://issues.apache.org/jira/browse/HDFS-2165    Author: Justin Joseph, 2013-02-22, 11:08
[HDFS-2164] Namenode supports Active and Standby modes; Standby Namenode should be able to able to take up the Active role dynamically, without losing any data. - HDFS - [issue]
...Namenode should have the capability to play dual roles, either as Active or Standby, as HA Agent decides. The Standby Namenode should contain the instance of Backup Namenode inside. When HA ...
http://issues.apache.org/jira/browse/HDFS-2164    Author: Justin Joseph, 2013-02-22, 11:01
[HDFS-2163] HA Agent should perform Active Namenode Election and should trigger the failover when Active Namenode goes down - HDFS - [issue]
...Provide the implementation for HA Agent which will be responsible for1) Electing the Active and Standby Namenodes2) Forcing the switch over of Standby to Active, when Active Namenode goes do...
http://issues.apache.org/jira/browse/HDFS-2163    Author: Justin Joseph, 2013-02-22, 11:00
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