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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
Enterprise ReplicationThe HCL OneDB™ Enterprise Replication Guide describes the concepts of data replication using HCL® OneDB® Enterprise Replication, including how to design your replication system, as well as administer and manage data replication throughout your enterprise.
Planning and designing for Enterprise ReplicationBefore you set up your replication system, plan how to include Enterprise Replication into your database server environment, design your database schema by following Enterprise Replication requirements, and then design your replication system between database servers.
Replication system designWhen you design a replication system, you make three main decisions: how the information flows between servers, how to resolve conflicts between replicated data, and the topology of the network of servers.
Conflict Resolution
Conflict resolution ruleThe conflict resolution rule determines how conflicts between replicated transactions are resolved.

Conflict resolution rule

The conflict resolution rule determines how conflicts between replicated transactions are resolved.

Enterprise Replication supports the following conflict resolution rules.


Conflict Resolution Rule	Effect
Ignore	Enterprise Replication does not attempt to resolve conflicts.
Time stamp	The row or transaction with the most recent time stamp is applied.
SPL routine	Enterprise Replication uses a routine written in SPL (Stored Procedure Language) that you provide to determine which data is applied.
Time stamp with SPL routine	If the time stamps are identical, Enterprise Replication uses an SPL routine that you provide to resolve the conflict.
Delete wins	DELETE and INSERT operations win over UPDATE operations; otherwise the row or transaction with the most recent time stamp is applied.
Always-apply	Enterprise Replication does not attempt to resolve conflicts. You must use the always-apply rule when you replicate TimeSeries data types.