Distributed Transaction Management

Distributed transactions can take place in an environment where an external transaction manager coordinates transaction execution using a specific protocol, such as X/Open XA. SAP ASE supports transactions using the CICS, Encina, TUXEDO, and MSDTC transaction managers through the DTM XA interface to SAP ASE.

Note: SAP ASE with the DTM XA interface provides features that were previously part of the XA-Server product. The XA-Server product is not required and is not included with SAP ASE. See the XA Interface Integration Guide for CICS, Encina, and TUXEDO for information about the DTM XA interface.

Configuration Considerations
Before configuring SAP ASE for DTM, you should consider how doing so affects the XA interface, external transactions, and RPC, CIS, and SYB2PC transactions.
Enabling DTM Features
The enable dtm parameter enables or disables basic DTM features.
Using SAP ASE Coordination Services
The work of a local SAP ASE transaction is sometimes distributed to remote servers that modify remote data.
DTM Administration and Troubleshooting
DTM administration includes using transactions and threads of control, querying systransactions, executing external transactions. Troubleshooting DTM includes recovering from a system failure, heuristically completing transactions, and using configuration options to track transaction issues.