Jiayi Zhou created HDFS-10702:
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Summary: Add a Client API and Proxy Provider to enable stale read
from Standby
Key: HDFS-10702
URL: https://issues.apache.org/jira/browse/HDFS-10702
Project: Hadoop HDFS
Issue Type: Improvement
Reporter: Jiayi Zhou
Assignee: Jiayi Zhou
Priority: Minor
Currently, clients must always talk to the active NameNode when performing any
metadata operation, which means active NameNode could be a bottleneck for
scalability. One way to solve this problem is to send read-only operations to
Standby NameNode. The disadvantage is that it might be a stale read.
Here, I'm thinking of adding a Client API to enable/disable stale read from
Standby which gives Client the power to set the staleness restriction.
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