Single-user to Multi-user Standalone or Client/Server

Changing from a single-user application to multi-user (either standalone or client/server) introduces the possibility of multi-user interference. This is prevented by proper locking techniques and/or transaction processing (available with the c-tree Server). See “Multi-User Concepts” and “Data Integrity” for more information.

A single-user standalone application can support transaction processing. If switching to multi-user standalone, transaction processing will not be available. Transaction processing is possible when migrating from single-user standalone to multi-user client/server, since both support transaction processing. In fact, this simplifies the locking issue since locking can easily be added to existing transaction processing calls. For example, replacing Begin(ctTRNLOG) with Begin(ctTRNLOG | ctENABLE). See “Adding Transaction Processing” and “Data Integrity” for more information.