Replication Server Presentation - Sybase

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Performance Enhancements Configurable Transaction Partitioning Background • Parallel DSI threads in RS attempt to apply transactions in the queue to the replicate DB in parallel • Each DSI thread opens a connection to the replicate DB • Commit order is still maintained – only the “body” of the transactions are applied in parallel • Transactions can also be grouped together to apply “more” in each unit of work – grouping rules decide which transactions can be grouped • Not all transaction “bodies” can be applied in parallel • Some of them may deal with the same tables/rows • Resulting in deadlocks and rollbacks, reducing throughput • Transaction grouping increases the chance of contention
Performance Enhancements Configurable Transaction Partitioning • Traditional Transaction Partitioning • The transactions (transaction groups) are partitioned across DSI threads in a round robin fashion Queue T3 T2 T1 T1 T2 T3 • Possibility of deadlocks or contention if transactions (groups) assigned to different threads work on the same tables or rows • Both transactions are rolled back and applied serially if a deadlock is detected
Page 4 and 5: Why Replicate • High Availability
Page 6 and 7: Replication System Architecture: Wa
Page 8 and 9: Replication and Live Decision Suppo
Page 11 and 12: Replication Server 12.5: New Featur
Page 13 and 14: Security - Advanced Security Option
Page 15 and 16: Security - SSL Support • The inte
Page 17 and 18: Flexibility - Unicode Support • R
Page 19 and 20: Flexibility - Unicode Support • R
Page 21 and 22: Flexibility - Extended Limits Data
Page 23 and 24: Flexibility - Extended Limits Data
Page 25 and 26: Flexibility - Multi-Vendor Replicat
Page 27 and 28: Flexibility - Heterogeneous Replica
Page 29: Replication Server 12.5 Performance
Page 33 and 34: Performance Enhancements Configurab
Page 35 and 36: Performance Enhancements SMP Suppor
Page 37 and 38: Performance Enhancements Commit Seq
Page 39: Summary • The e-Business data man

Replication Server Presentation - Sybase

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