caching maxResultSize AllowPartialScanResultCache Cell-1 Cell-2 RowKey-1 Cell-3 Cell-4 RowKey-2 Cell-5 RowKey-3 Cell-7 RowKey-4 Cell-6 Cell-8 Cell-9 Cell-1 Result-1 Cell-4 Result-3 Cell-5 Result-4 limit Caching maxResultSize CompleteScanResultCache Cell-1 Cell-2 RowKey-1 Cell-3 Cell-4 RowKey-2 Cell-5 RowKey-3 Cell-7 RowKey-4 Cell-6 Cell-8 Cell-9 Cell-1 Result-1 Cell-4 Result-3 Cell-5 Result-4 limit Caching Caching Caching BatchScanResultCache Cell-1 Cell-2 RowKey-1 Cell-3 Cell-4 RowKey-2 Cell-5 RowKey-3 Cell-7 RowKey-4 Cell-6 Cell-8 Cell-9 Cell-1 Result-1 Cell-4 Result-3 Cell-5 Result-4

ID in hbase:meta ○ WAL Entry only has an encoded region name, but rowkey in hbase:meta is a full region name, the two different rowkey format messed up the hbase:meta. ○ Inconsistent between WAL position(ZK) Last Pushed Seq ID (Region) WAL-Position Original Design New Design RowKey: Encoded Region Name RowKey: Encoded Region Name RowKey: Full Region Name Why to reimplement the serial replication #1 ➢ ID in hbase:meta ○ WAL Entry only has an encoded region name, but rowkey in hbase:meta is a full region name, the two different rowkey format messed up the hbase:meta. ○ Inconsistent between WAL position(ZK)