IMS in the Parallel Sysplex Volume III IMSplex Implementation and Operations

Chapter 10. Common Service Layer (CSL) operations 223

6. Start SPOC

– Anytime after OM started

10.1.3 IMSplex address spaces relationship

Table 10-1 shows the sequence in which components in a CSL should be started and their

relationship.

Table 10-1 IMSplex address spaces relationship

10.2 Start the CSL address spaces

The CSL address spaces (SCI,CQS, OM and RM) should be started before the IMS address

spaces are started, although if any of them are not there when IMS tries to connect, IMS will

give a warning message with an option to cancel or retry.

10.2.1 Structured Call Interface

The first address space to be started should always be the Structured Call Interface (SCI)

address space. It can be started using the standard z/OS start command (

START

procedure_name

) as in this example:

S IM1ASC

Name Started by Needs Needed by Reg.

with

SCI User All IMSplex

components. If not

active, may cause

that component to

abend.

CQS IMS if serving as

shared queues

manager, user if

used by RM

SCI up on the CQS’s z/OS image. If

not, a warning message is issued

 RM

 IMS using

shared queues

SCI

OM User SCI up on the OM’s z/OS image. If

not, warning message before abend.

RM SCI

RM User

 SCI active on the RM’s z/OS

image. If not, warning message

before abend.

 At least one OM active in the

IMSplex. If not, issues error

message.

 CQS active if resource structure

is used. If not, retry register

several times before abend.

IMS CQS, OM

IMS User All IMSplex components. If not,

issue a WTOR and then wait.

SCI,

CQS,

OM, RM

DBRC IMS SCI if ARLN is enabled SCI if

ARLN is

enabled

224 IMS in the Parallel Sysplex, Volume III: IMSplex Implementation and Operations

After the SCI address space has been initialized successfully, SCI issues this message:

CSL0020I SCI READY IM1ASC

You can specify the following parameters to override the start procedure definitions:

 BPECFG

Name of BPE configuration member in the PROCLIB

 SCIINIT

Suffix for your CSLSIxxx member in the PROCLIB

 PARM1

Other override parameters:

ARMRST Indicates if ARM should be used

SCINAME Name of the SCI being started

Here is an example of a start command with parameter overrides:

S IM1ASC,PARM1 ='ARMRST=Y,SCINAME=IM1ASC'

10.2.2 Common Queue Server

After the SCI address space is up, start CQS next. OM does not need CQS but both IMS and

RM will register with CQS. CQS may be started by IMS if also serving as shared queues

manager, but it must be started by user if used only for RM. It can be started using the

standard z/OS start command as in this example:

S IM1ACQS

After the CQS address space has been started, it issues messages for connecting the CF

structures, taking the checkpoints and eventually this message:

CQS0020I CQS READY CQ1ACQS

Note that the CQS ready message identifies the component name (CQ1A) and the

component type (CQS). This is also true for all other CSL address spaces. Example 10-1

shows an example of messages issued when CQS is started and it connects to the shared

queues structures and to the resource structure.

Example 10-1 Joblog for a CQS start

IEF695I START IM1ACQS WITH JOBNAME IM1ACQS IS ASSIGNED TO USER STC , GROUP SYS1

$HASP373 IM1ACQS STARTED

IEF403I IM1ACQS - STARTED - TIME=16.18.40 - ASID=0067 - SC42

CQS0008W STRUCTURE IM0A_MSGP IS VOLATILE; CONSIDER STRUCTURE CHECKPOINT CQ1ACQS

IXL014I IXLCONN REQUEST FOR STRUCTURE IM0A_MSGP 122

WAS SUCCESSFUL. JOBNAME: IM1ACQS ASID: 0067

CONNECTOR NAME: CQSCQ1ACQS CFNAME: CF05

CQS0008W STRUCTURE IM0A_EMHP IS VOLATILE; CONSIDER STRUCTURE CHECKPOINT CQ1ACQS

IXL014I IXLCONN REQUEST FOR STRUCTURE IM0A_EMHP 124

WAS SUCCESSFUL. JOBNAME: IM1ACQS ASID: 0067

CONNECTOR NAME: CQSCQ1ACQS CFNAME: CF05

CQS0008W STRUCTURE IM0A_RSRC IS VOLATILE; CQ1ACQS

IXL014I IXLCONN REQUEST FOR STRUCTURE IM0A_RSRC 126

WAS SUCCESSFUL. JOBNAME: IM1ACQS ASID: 0067

CONNECTOR NAME: CQSCQ1ACQS CFNAME: CF05

CQS0008W STRUCTURE IM0A_MSGO IS VOLATILE; CONSIDER STRUCTURE CHECKPOINT CQ1ACQS

IXL014I IXLCONN REQUEST FOR STRUCTURE IM0A_MSGO 128

WAS SUCCESSFUL. JOBNAME: IM1ACQS ASID: 0067

CONNECTOR NAME: CQSCQ1ACQS CFNAME: CF05

IXL014I IXLCONN REQUEST FOR STRUCTURE IM0A_EMHO 131

CQS0008W STRUCTURE IM0A_EMHO IS VOLATILE; CONSIDER STRUCTURE CHECKPOINT CQ1ACQS