huaxiangsun opened a new pull request #2522:
URL: https://github.com/apache/hbase/pull/2522
…ation.
It creates a replication endpoint for meta/root:
1. Supports multiple primary meta regions per region server.
2. For each replica region, there is a shipper, internally, wal edits are
queued to shipper's own queue.
each shipper ships edits at their own paces so the slow region server
wont block the fast ones.
The queue is cleanedup when flush event is seen.
3. Each primary region registers/deregisters based on
REGION_OPEN/REGION_CLOSE events from wal.
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