Surendra Singh Lilhore created HDFS-15067:
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Summary: Optimize heartbeat for large cluster
Key: HDFS-15067
URL: https://issues.apache.org/jira/browse/HDFS-15067
Project: Hadoop HDFS
Issue Type: Improvement
Components: datanode
Affects Versions: 3.1.1
Reporter: Surendra Singh Lilhore
Assignee: Surendra Singh Lilhore
In a large cluster Namenode spend some time in processing heartbeats. For
example, in 10K node cluster namenode process 10K RPC's for heartbeat in each
3sec. This will impact the client response time. This heart beat can be
optimized. DN can start skipping one heart beat if no
work(Write/replication/Delete) is allocated from long time. DN can start
sending heart beat in 6 sec. Once the DN stating getting work from NN , it can
start sending heart beat normally.
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