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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