HDFS-362 FSEditLog should not writes long and short as UTF8 and should not use ArrayWritable for writing non-array items
HDFS-311 Modifications to enable multiple types of logging
HADOOP-5502 Backup and checkpoint nodes should be documented
Hadoop Flags:
Reviewed, Incompatible change
Release Note:
Introduced backup node which maintains the up-to-date state of the namespace by receiving edits from the namenode, and checkpoint node, which creates checkpoints of the name space. These facilities replace the secondary namenode.
Currently Secondary name-node acts as mere checkpointer.
Secondary name-node should be transformed into a standby name-node (SNN).
The long term goal is to make it a warm standby.
The purpose of this issue is to provide real time streaming of edits to SNN so that it contained the up-to-date namespace state.
Description
Currently Secondary name-node acts as mere checkpointer.
Secondary name-node should be transformed into a standby name-node (SNN).
The long term goal is to make it a warm standby.
The purpose of this issue is to provide real time streaming of edits to SNN so that it contained the up-to-date namespace state.
New Feature
Resolved
Major
Streaming Edits to a Standby Name-Node.
