Logging environment for data sharing

In a data sharing environment, the member subsystems still maintain separate recovery logs. Each manages its own active and archive log data sets and records those in its own bootstrap data set (BSDS).

The shared communications area (SCA) in the coupling facility contains information about all members' BSDSs and log data sets. In addition, every member's BSDS contains information about other members' BSDS and log data sets, in case the SCA is not available.

The following figure illustrates a typical logging environment.

Figure 1. Member BSDSs and logs in the data sharing environment
Begin figure summary. This logging environment includes three members. Each of them has its own active and archive log. Detailed description available.