Mike Drob created HBASE-20835:
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             Summary: Document how to get replication reporting
                 Key: HBASE-20835
                 URL: https://issues.apache.org/jira/browse/HBASE-20835
             Project: HBase
          Issue Type: Task
          Components: Replication
    Affects Versions: 2.1.0
            Reporter: Mike Drob
            Assignee: Duo Zhang
             Fix For: 2.1.0


Based on my questions at the tail end of HBASE-19543

bq. We have some tooling that checks on replication queues and reads the znode 
as the source of truth. When replication is disabled, it's expected that the 
node was still there, but just empty. Is there a better way to get this same 
information?

I understand that with table based replication it doesn't make sense to check 
ZK for status. However, losing the ability to inspect the data and get 
information is a tough hit for operators. Do we have APIs that expose the same 
sort of metrics?

bq. how many peers/queues, queue size, position in the queue, and age of last op

Assigning to you for now, Duo, since you were both primary implementor and RM 
for 2.1.0 and I'm not sure who else would know the answers. If the docs already 
exist, then nothing to do but we should include them in the RN. Maybe this will 
need additional code, but I hope it's already there and is something we can 
write a workaround for.



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