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https://issues.apache.org/jira/browse/PHOENIX-5521?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Viraj Jasani resolved PHOENIX-5521.
-----------------------------------
Resolution: Fixed
> Phoenix-level HBase Replication sink (Endpoint coproc)
> ------------------------------------------------------
>
> Key: PHOENIX-5521
> URL: https://issues.apache.org/jira/browse/PHOENIX-5521
> Project: Phoenix
> Issue Type: Sub-task
> Reporter: Geoffrey Jacoby
> Assignee: Viraj Jasani
> Priority: Major
> Fix For: 5.2.0
>
>
> An HBase coprocessor Endpoint hook that takes in a request from a remote
> cluster (containing both the WALEdit's data and the WALKey's annotated
> metadata telling the remote cluster what tenant_id, logical tablename, and
> timestamp the data is associated with).
> Ideally the API's message format should be configurable / pluggable, and
> could be either a protobuf or an Avro schema similar to the WALEdit-like one
> described by PHOENIX-5443. Endpoints in HBase are structured to work with
> protobufs, so some conversion may be necessary in an Avro-compatible version.
> Future work may also extend this to any conforming schema given by a schema
> service such as the one in PHOENIX-5443, which would be useful in allowing
> PHOENIX-5442's CDC service to be used as a backup / migration tool.
> The endpoint hook would take the metadata + data and regenerate a complete
> set of Phoenix mutations, both data and indexes, just as the phoenix client
> did for the original SQL statement that generated the source-side edits.
> These mutations would be written to the remote cluster by the normal Phoenix
> write path.
>
> HBASE-27529 provides regionserver coproc hook to attach WAL extended
> attributes to mutations at replication sink. We can utilize this hook and
> provide end-to-end flow for Phoenix metadata attributes (tenant id, schema
> name, logical table name, table type etc). The source cluster can attach the
> metadata attributes to source mutations. By using
> "phoenix.append.metadata.to.wal", the attributes can be appended to WAL in
> the form of extended attributes. By using a new regionserver coproc in
> Phoenix, we can utilize HBASE-27529 and allow the sink cluster to attach the
> WAL extended attributes to Mutations. This way, IndexRegionObserver and other
> coproc endpoints would be able to get Phoenix metadata attributes in both
> source and sink clusters.
>
> The changes required to enable replication sink coproc, and allow it to
> attach phoenix metadata as Mutation attributes at the Sink cluster:
> # Add "org.apache.phoenix.coprocessor.ReplicationSinkEndpoint" to
> hbase.coprocessor.regionserver.classes config
> # phoenix.append.metadata.to.wal = true
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