IMS/ESA Shared Queues: A Planning Guide

shared-queues group, the four IVTNO (nonserial) transactions queued were

processed and the command

/DISPLAY QCNT TRANSACTION MSGAGE 0 showed no

messages in the shared-queue.

The previous scenario is a description of a working-as-designed situation where

we tried to change from nonserial to serial a transaction that had a global queue

count greater then zero.

We reran the tests with only serial transactions on the shared-queue:

/DISPLAY QCNT TRANSACTION MSGAGE 0

QUEUENAME QCNT-TOTAL QCNT-AGED TSTMP-OLD TSTMP-NEW

IVTNO IMA2 1 1 98212/110444 98212/110444

IVTNO IMA1 1 1 98212/110458 98212/110458

*98212/111819*

These transactions were correctly forced to process on the IMS where the

transactions were entered:

•

IVTNO entered from IMA1 processed on IMA1

•

IVTNO entered from IMA2 processed on IMA2

11.3 EMH Structure Testing

This test was cursory as Telstra does not use any EMH transactions, but the

Fast-Path control macro (FPCTRL) is present in their generation deck for DEDB

support. The test was conducted to show the use of EMH structure. The IMS

EMH IVP transaction (IVTFD) was used for this test.

The test began with starting the IFP region in IMA1. Initial statistics are shown

below.

/DISPLAY Q BALGRP

BALGRP NO.RGNS MSG CT ENQ COUNT DEQ COUNT

*NO QUEUES*

*98212/081921*

/DISPLAY QCNT BALGRP MSGAGE 0

QUEUENAME QCNT-TOTAL QCNT-AGED TSTMP-OLD TSTMP-NEW

*98212/081930*

Chapter 11. Miscellaneous Shared-Queue Tests 103

/CQQUERY STATISTICS STRUCTURE ALL

STRUCTURE NAME LEALLOC LEINUSE ELMALLOC ELMINUSE LE/EL

IMA0MSGQ 126 12 127 12 0001/0001

IMA0MSGQOV N/A N/A N/A N/A N/A

IMA0EMHQ 126 4 127 4 0001/0001

IMA0EMHQOV N/A N/A N/A N/A N/A

*98212/081939*

The transaction IVTFD TADD was entered, without any reply to the WTOR, as

shown below:

/DISPLAY Q BALGRP

BALGRP NO.RGNS MSG CT ENQ COUNT DEQ COUNT

DFSIVP4 1 0 1 1

*98212/082315*

/DISPLAY QCNT BALGRP MSGAGE 0

QUEUENAME QCNT-TOTAL QCNT-AGED TSTMP-OLD TSTMP-NEW

*98212/082348*

/CQQUERY STATISTICS STRUCTURE ALL

STRUCTURE NAME LEALLOC LEINUSE ELMALLOC ELMINUSE LE/EL

IMA0MSGQ 126 12 127 12 0001/0001

IMA0MSGQOV N/A N/A N/A N/A N/A

IMA0EMHQ 126 4 127 4 0001/0001

IMA0EMHQOV N/A N/A N/A N/A N/A

*98212/082406*

Log on to IMA2 and enter one IVTFD display transaction. The displays are

shown below:

/DISPLAY Q BALGRP

BALGRP NO.RGNS MSG CT ENQ COUNT DEQ COUNT

*NO QUEUES*

*98212/082601*

/DISPLAY QCNT BALGRP MSGAGE 0

QUEUENAME QCNT-TOTAL QCNT-AGED TSTMP-OLD TSTMP-NEW

DFSIVP4 1 1 98212/082510 98212/082510

*98212/082614*

104 IMS/ESA Shared Queues Planning Guide

/CQQUERY STATISTICS STRUCTURE ALL

STRUCTURE NAME LEALLOC LEINUSE ELMALLOC ELMINUSE LE/EL

IMA0MSGQ 126 12 127 12 0001/0001

IMA0MSGQOV N/A N/A N/A N/A N/A

IMA0EMHQ 126 5 127 5 0001/0001

IMA0EMHQOV N/A N/A N/A N/A N/A

*98212/082623*

The display showed that the IVTFD transaction entered from IMA2 is queued to

the EMH structure because there is no local IFP region and the remote IFP

region is not available.

A further five IVTFD transactions were entered from IMA1 where the IFP region is

running but not available (it is still processing the initial TADD transaction.) The

resulting display is shown below:

/DISPLAY Q BALGRP

BALGRP NO.RGNS MSG CT ENQ COUNT DEQ COUNT

DFSIVP4 1 5 6 1

*98212/083049*

/DISPLAY QCNT BALGRP MSGAGE 0

QUEUENAME QCNT-TOTAL QCNT-AGED TSTMP-OLD TSTMP-NEW

DFSIVP4 1 1 98212/082510 98212/08 2510

*98212/083104*

/CQQUERY STATISTICS STRUCTURE ALL

STRUCTURE NAME LEALLOC LEINUSE ELMALLOC ELMINUSE LE/EL

IMA0MSGQ 126 12 127 12 0001/0001

IMA0MSGQOV N/A N/A N/A N/A N/A

IMA0EMHQ 126 5 127 5 0001/0001

IMA0EMHQOV N/A N/A N/A N/A N/A

*98212/083119*

The five transactions entered from IMA1 do not show up in the structure display.

This is because no more than five transactions are queued to this balancing

group.

One more IVTFD transaction was then entered from IMA1.

The number of IFP regions servicing this balancing group divided by 4 (that is

1/4) is less than the number of transactions queued (6), so there are more

transactions to be processed than can sensibly be processed locally. They are

passed to CQS and put on the EMHQ structure, as shown below:

Chapter 11. Miscellaneous Shared-Queue Tests 105

/DISPLAY Q BALGRP

BALGRP NO.RGNS MSG CT ENQ COUNT DEQ COUNT

DFSIVP4 1 5 6 1

*98212/083242*

/DISPLAY QCNT BALGRP MSGAGE 0

QUEUENAME QCNT-TOTAL QCNT-AGED TSTMP-OLD TSTMP-NEW

DFSIVP4 2 2 98212/082510 98212/083230

*98212/083253*

/CQQUERY STATISTICS STRUCTURE ALL

STRUCTURE NAME LEALLOC LEINUSE ELMALLOC ELMINUSE LE/EL

IMA0MSGQ 126 12 127 12 0001/0001

IMA0MSGQOV N/A N/A N/A N/A N/A

IMA0EMHQ 126 6 127 6 0001/0001

IMA0EMHQOV N/A N/A N/A N/A N/A

*98212/083303*

An IFP was then started on IMA2:

/START REGION IMA2FPI1

DFS058I 08:35:45 START COMMAND IN PROGRESS

All transactions in the structure were processed, as shown below:

/DISPLAY Q BALGRP

BALGRP NO.RGNS MSG CT ENQ COUNT DEQ COUNT

DFSIVP4 1 0 3 3

*98212/083703*

/DISPLAY QCNT BALGRP MSGAGE 0

QUEUENAME QCNT-TOTAL QCNT-AGED TSTMP-OLD TSTMP-NEW

*98212/083728*

/CQQUERY STATISTICS STRUCTURE ALL

STRUCTURE NAME LEALLOC LEINUSE ELMALLOC ELMINUSE LE/EL

IMA0MSGQ 126 12 127 12 0001/0001

IMA0MSGQOV N/A N/A N/A N/A N/A

IMA0EMHQ 126 4 127 4 0001/0001

IMA0EMHQOV N/A N/A N/A N/A N/A

*98212/083738*

The five transactions entered from IMA1 on the local BALGRP were not

processed because the IFP on IMA1 was still processing the IVTFD TADD

transaction; it was waiting for the WTOR.

106 IMS/ESA Shared Queues Planning Guide