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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