164 IMS in the Parallel Sysplex, Volume I: Reviewing the IMSplex Technology
Figure 7-13 Resources in an IMSplex
7.6.1 IMSplex components related to RM
The IMSplex components related to RM include:
򐂰 RM address space
At least 1 RM required in IMSplex defined with CSL
1 RM on each z/OS system best for performance
Only one RM allowed in IMSplex with no resource structure
򐂰 Common Service Layer address spaces
At least 1 Operations Manager (OM) required in IMSplex
Structured Call Interface (SCI) required on each z/OS system
򐂰 RM clients (IMS subsystems)
Each IMS DB/DC, DCCTL, or DBCTL subsystem is a client
򐂰 Coupling Facility list structure (resource structure)
Resource structure contains global resources (optional)
򐂰 Common Queue Server (CQS)
Required if resource structure is defined
RM registers to one CQS that must reside in the same system (LPAR)
7.6.2 Resource management functions
IMS Version 8 begins the process of exploiting the RM infrastructure by providing the
following resource management functions:
Static
Dynamic
APPC
ISC
MSC
ISC
Parallel
Sessions
Single Session
IMSplex
Resources are
Shared
CF
IMSplex
IMS1
IMS3
IMS2

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