[jira] [Created] (HBASE-23270) Inter-cluster replication is unaware destination peer cluster's RSGroup to push the WALEdits

["Pradeep (Jira)" <ji...@apache.org>]

Pradeep created HBASE-23270:
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             Summary: Inter-cluster replication is unaware destination peer cluster's RSGroup to push the WALEdits
                 Key: HBASE-23270
                 URL: https://issues.apache.org/jira/browse/HBASE-23270
             Project: HBase
          Issue Type: Bug
            Reporter: Pradeep


In a source RSGroup enabled HBase cluster where replication is enabled to another destination RSGroup enabled cluster, the replication stream of List<WAL.Edit> go to any node in the destination cluster without the awareness of RSGroup and then gets routed to appropriate node where the region is hosted. This extra hop where the data is received and routed could be of any node in the cluster and no restriction exists to select the node within the same RSGroup.

Implications: RSGroup owner in the multi-tenant HBase cluster can see performance and throughput deviations because of this unpredictability caused by replication.

Potential fix: options:

a) Select a destination node having RSGroup awareness

b) Group the WAL.Edit list based on region and then by region-servers in which the regions are assigned in the destination. Pass the list WAL.Edit directly to the region-server to avoid extra intermediate hop in the destination cluster during the replication process. 



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