Introduction

BSA XCF works in conjunction with BSA Cross Memory (CM) and OCF.

Configuration types

BSA XCF enables the following configurations:

• Communication within a sysplex using BSA XCF with BSA Cross Memory (CM).
• Communication within the sysplex itself and, in addition, with a system outside the sysplex. This configuration uses BSA XCF with BSA Cross Memory (CM) in conjunction with OCF.

BSA XCF with BSA Cross Memory (CM)

In the BSA XCF with BSA Cross Memory (CM) configuration, Beta subsystems on different LPARS communicate with one another via the BSA XCF protocol. Beta subsystems and users located on the same LPAR are connected by BSA CM, i.e. via the Beta SVC. XCF also makes it possible to interconnect different Beta products (e.g. B93, B97).

BSA XCF in conjunction with OCF

In BSA XCF in conjunction with OCF, Beta subsystems connected within a sysplex by means of BSA XCF/CM can also be given access to an LPAR that is not part of the sysplex. The connection between the sysplex and the external LPAR is set up via OCF.

SSID search order

BSA searches for a requested subsystem ID in the following sequence:

1. CM (i.e. on the local LPAR where the user or batch job is currently working)
2. XCF (i.e. within the BSA XCF complex)
3. OCF (i.e. on the active OCF complex)