Software requirements

IMS 15.4 has base software requirements. Some individual functions have additional software requirements.

Operating software requirements
IMS 15.4 and its various functions have specific operating software requirements.
IMS 15.4 base software requirements
The base IMS 15.4 system runs on z/OS® Version 2 Release 4 or later. Certain features and functions have additional software requirements.
Coexistence APARs
Certain functions of IMS 15 can coexist with IMS Version 13 and IMS 14 with the appropriate coexistence APARs applied.
Database Resource Adapter (DRA) software requirements
The version of the IMS DRA modules that are used by a DRA client must be the same version as the IMS with which the DRA client is communicating.
Data sharing software requirements
For block-level data sharing, IRLM Version 2.3 (5635-A06) or later is required. The IRLM is an independent component that is shipped with IMS 15. The IRLM must be defined as a z/OS subsystem. Block-level data sharing of databases is supported between all in-service levels of IMS.
HALDB Index/ILDS Rebuild utility free space function software requirements
The HALDB Index/ILDS Rebuild utility (DFSPREC0) requires four 2 GB data spaces to store and sort the rebuilt indirect list entries (ILEs) before reloading them into the ILDS.
IMS callout function software requirements
To support the IMS callout function, OTMA must be enabled in IMS and IMS Connect configured for callout support.
IMS Connect software requirements
IMS Connect has software requirements in addition to those of the base IMS product.
Java application program support in IMS 15.4
Java™ applications that run in or access IMS 15.4 must meet specific software requirements.
Open Database solution software requirements
To use the Open Database solution, IMS must be configured as an IMSplex and IMS Connect is required.
Parallel RECON access software requirements
To use the parallel RECON access function of Database Recovery Control (DBRC), you must configure IMS as an IMSplex and install DFSMS Transactional VSAM Services (DFSMStvs), a separately orderable feature of z/OS.
SQL support software requirements
For IMS to process SQL calls in the native host environment, COBOL Version 6.2 (5655-EC6) or later with IMS coprocessor support is required. With COBOL Version 6.2 (5655-EC6) or later, all load modules must reside within a partitioned data set extended (PDSE). The IMS catalog must be enabled for this SQL support.
User exit enhancements software requirements
Exits to be queried or refreshed using type-2 commands must first be defined in the <USER_EXITS> section of the DFSDFxxx member of the IMS PROCLIB data set.
IMS Enterprise Suite software requirements
IMS Enterprise Suite provides APIs, tools, and a web service solution for facilitating application development and extending access to IMS transactions and data.
CICS subsystems supported
IBM® CICS® Transaction Server for z/OS can connect to IMS if minimum version requirements are met. Certain IMS 15.4 functions might include additional version requirements for CICS.
Db2 for z/OS subsystems supported
IMS 15.4 Transaction Manager can connect with Db2 for z/OS.
IBM MQ subsystems supported
IMS 15.4 supports IBM MQ Version 9.1 (5724-H72) or later.
Intersystem Communication (ISC) subsystems supported
Using Intersystem Communication (ISC), the IMS 15 Transaction Manager can be connected to IMS 15 and earlier systems, to IBM CICS Transaction Server for z/OS, and to user-written software.
Programming languages used to write IMS 15.4
IMS 15.4 is written in High Level Assembler Release 6, PL/X, C, C++, and JDK Version 8.
Programming languages supported
You can write IMS applications in the supported versions of many programming languages.
Application programs supported
IMS 15.4 supports application programs that are supported by IMS Version 13 and IMS 14 and all earlier releases of IMS 15.

Parent topic: General planning information for IMS 15.4