The following document provides step-by-step instructions for reconfiguring an existing installation of MQSeries into an HACMP compatible installation of MQSeries. These instructions assume there is a volume group called "<Machine Identifier>datavg" which exists on a shared external disk array. The "<Machine Identifier>" portion of the volume group name is a string of characters which uniquely identifies the machine with which the volume group is normally associated. As an example, this document describes a two machine, mutual failover cluster using machine names of "mtxeai01" and "mtxeai02".

The volume group, logical volume and file system naming standards used in this document conform to the standardized methodology detailed in the document titled "Filesystem Naming". Two logical volumes are created during this procedure which occupy 2.5 GB of disk space. The amount of disk space used for each logical volume can be changed to suit the implementation requirements.

1. mtxeai01: Run the following script, which will create and modify the various file systems required for the implementation of MQSeries in an AIX HACMP environment:

   
   #!/bin/ksh
   ################################################################
   # 
   # Customize the following shell variables for each 
   # machine on which this script is run.
   # 
   ################################################################
   PPSIZE="16"
   DISKNBR="power3"
   MACHID="eai01"
   QMNAME="P2EAIAIX"
   ################################################################
   
   umount /mtx${MACHID}/ibm/mqm/${QMNAME}/data
   umount /mtx${MACHID}/ibm/mqm/${QMNAME}/log
   rmfs /mtx${MACHID}/ibm/mqm/${QMNAME}/data
   rmfs /mtx${MACHID}/ibm/mqm/${QMNAME}/log
   
   #  Logical Volume: /dev/${MACHID}datalv (edge)
   mklv -y${MACHID}datalv -ae ${MACHID}datavg \
     $(( 750 / ${PPSIZE} )) hdisk${DISKNBR}
   
   #  Logical Volume: /dev/${MACHID}logslv (center)
   mklv -y${MACHID}logslv -ac ${MACHID}datavg \
     $(( 1750 / ${PPSIZE} )) hdisk${DISKNBR}
   
   #  File System: /mtx${MACHID}/ibm/mqm/${QMNAME}/data
   crfs -v jfs -a bf=true -d${MACHID}datalv \
     -m/mtx${MACHID}/ibm/mqm/${QMNAME}/data -Ayes -prw \
     -tno -a nbpi=4096 -a ag=64
   mount /mtx${MACHID}/ibm/mqm/${QMNAME}/data
   
   #  File System: /mtx${MACHID}/ibm/mqm/${QMNAME}/log
   crfs -v jfs -a bf=true -d${MACHID}logslv \
     -m/mtx${MACHID}/ibm/mqm/${QMNAME}/log -Ayes -prw \
     -tno -a nbpi=4096 -a ag=64
   mount /mtx${MACHID}/ibm/mqm/${QMNAME}/log
   
   ln -s /mtx${MACHID}/ibm/mqm /MQHA
   chfs -An /mtx${MACHID}/ibm/mqm/${QMNAME}/data
   chfs -An /mtx${MACHID}/ibm/mqm/${QMNAME}/log
   chvg -a'n' -Q'y' -x'n' ${MACHID}datavg 
   chown -R mqm.mqm /mtx${MACHID}/ibm/mqm/${QMNAME}
   
   
   

2. mtxeai01: Create the MQSeries HACMP script top level directory:

   
$ ln -s /mtxeai01/ibm/mqm /MQHA

3. mtxeai02: Create the MQSeries HACMP script top level directory and the Queue Manager directory for the remote Queue Manager.

   
$ ln -s /mtxeai02/ibm/mqm /MQHA
$ ln -s /mtxeai01/ibm/mqm/P2EAIAIX /mtxeai02/ibm/mqm/P2EAIAIX

4. mtxeai01: Copy the HA scripts into the /MQHA/bin directory

   
$ cp /usr/sys/inst.images/mqseries/* /MQHA/bin
$ chown mqm.mqm /MQHA/bin/ha*
$ chmod 755 /MQHA/bin/ha*

5. mtxeai01: Create the MQSeries queue manager using the HACMP scripts:

   
$ export MQHAFSDATA=/mtxeai01/ibm/mqm/P2EAIAIX/data
$ export MQHAFSLOG=/mtxeai01/ibm/mqm/P2EAIAIX/log
$ cd /MQHA/bin
$ ./hacrtmqm -ll -lf 16384 -lp 10 -ls 5 -q \
  -u SYSTEM.DEAD.LETTER.QUEUE P2EAIAIX

6. mtxeai02: Create the corresponding links on the failover side, login as "mqm":

   
$ su - mqm -c halinkmqm P2EAIAIX P2EAIAIX /MQHA/P2EAIAIX/data

7. mtxeai01: Edit the initialization file and remove all duplicate or inappropriate references to queue managers:

   
$ me /var/mqm/mqs.ini

8. mtxeai02: Edit the initialization file and remove all duplicate or inappropriate references to queue managers:

   
$ me /var/mqm/mqs.ini

9. mtxeai01: login as root and start the Queue manager using the HACMP scripts:

   
$ cd /MQHA/bin
$ ./hamqm_start P2EAIAIX

10. mtxeai01: change the file systems and volume group to NOT automatically startup at system boot time:

    
$ chfs -An /mtxeai01/ibm/mqm/P2EAIAIX/data
$ chfs -An /mtxeai01/ibm/mqm/P2EAIAIX/log
$ chvg -a'n' -Q'y' -x'n' eai01datavg

11. mtxeai02: HACMP command to start the cluster environment:

    
$ /usr/sbin/cluster/etc/rc.cluster -boot '-N' '-b' '-i'

12. mtxeai01: HACMP command to start the cluster environment:

    
$ /usr/sbin/cluster/etc/rc.cluster -boot '-N' '-b' '-i'