This section provides example configurations of Adabas Transaction Manager with the Adabas System Coordinator. It guides you through typical configurations using the SYSATM and SYSCOR administration tools. It is best to read through all the examples in turn because the configuration issues become increasingly complex with each successive example.
The Adabas System Coordinator is a prerequisite technology for Adabas Transaction Manager, Adabas Fastpath, Adabas Vista and Adabas SAF Security. Traditionally these products have focused their functionality and benefit on Adabas client sessions rather than explicitly on Adabas servers. The type of Adabas session that has been required in the past can be described as "static". Static Adabas client sessions are not able to move from one job to another within the system for load balancing purposes (this is called dynamic transaction routing). However, an increasing requirement is emerging for Adabas clients to be able to support dynamic transaction routing (DTR). One of the main purposes of the Adabas System Coordinator is to provide transparent DTR support for Adabas Transaction Manager, Adabas Fastpath, Adabas Vista and Adabas SAF Security.
These products always use Adabas System Coordinator services to support their clients. Traditional (static) clients only need to use the default (local) mode of Adabas System Coordinator services. In local mode, the Adabas System Coordinator software is embedded in the application job and provides local support for client sessions. However, DTR clients must use the Adabas System Coordinator daemon services to move client sessions around the system. In daemon mode, the local Adabas System Coordinator software works in conjunction with counterparts in the daemon to make sure the client sessions can be dynamically moved around the system. You must control these options by configuration.
Note:
You may also configure static clients to use daemon services if you
wish. This is achieved by using SYSCOR to set the “Managed by daemon” job
parameter for the application job or TP system to “Y”. This will make it
possible to monitor users in these jobs and TP systems from SYSCOR or SYSATM
running in any environment which has access to the System Coordinator daemon.
Note that this option increases the use of shared memory in the system.
The Adabas System Coordinator daemon also provides services to ATM daemons. In particular, it provides ATM daemons with details of resource managers and other ATM daemons in the network. Also, in a clustered environment, the System Coordinator daemons in a group provide a central repository, or file store, in which the ATM daemons in the cluster can store records of incomplete transactions that have migrated within the cluster. This is totally separate from the clustered application services. The following examples are provided for running Adabas Transaction Manager with the Adabas System Coordinator.
Single System with Static Clients
Static client support from the Adabas System Coordinator in local mode. The Adabas System Coordinator daemon is only needed to provide services to the ATM daemon.
Multi System with Static Clients
Static client support from the Adabas System Coordinator in local mode. The Adabas System Coordinator daemon is only needed to provide services to the ATM daemon in each system image.
Single System with Dynamic Transaction Routing Clients
DTR client support from the Adabas System Coordinator in daemon mode. The Adabas System Coordinator daemon is also needed to provide services to the ATM daemon in each system image.
SYSPLEX with Dynamic Transaction Routing Clients
DTR client support from the Adabas System Coordinator in daemon mode using the IBM Coupling Facility to enable multi-systems client DTR. The Adabas System Coordinator daemon is also needed to provide services to the ATM daemon in each system image.
A single system is one in which only one operating system image is used, perhaps in isolation within a larger complex site. In this type of environment, you will need to do the following:
Obtain a new Node ID from your administrator to use for the Adabas System Coordinator daemon. In this example, Node ID 9001 is used.
Define the Adabas System Coordinator group. This example shows a group called TESTSING.
Define the sole member of the Adabas System Coordinator group. In this example, the member is SYSCO1.
Specify the Adabas System Coordinator group in which the ATM daemon will operate. This example uses the group SYSCO1.
Define the job(s) for which Adabas Transaction Manager is to provide transaction coordination. This example uses job CICTSING.
You can perform the required configuration by taking the following steps:
In this SYSCOR example the Adabas System Coordinator group name is TESTSING, the SVC is 253, and the system type is Standard (Single-system image). It is not necessary to specify a cluster facility name in this case because this is only required for running in SYSPLEX mode.
16:22:19 Modify 2004-03-03
System Coordinator Group Member C11230M1
Group Name: TESTSING SVC ID: 253
System Type: X Standard (Single-system image)
(Mark one) _ Standard (Multi-system images)
_ Sysplex (IBM Parallel Sysplex)
Cluster Facility Name : ________________
Automatic Pool Recovery: Y
Command ==>
PF1 Help PF3 Exit PF5 Upd |
Now you must define the daemon member of the Adabas System Coordinator group in SYSCOR. There is usually one daemon running in each system image. Obviously in a single system there is only one member required. The name of the member must be the same as the job name to be run, otherwise the parameters will not be located at runtime. In addition to the name you must also specify the (database or) node number in the Software AG network to be used by the daemon member. This node number must not be currently used for any other purpose. In our example the member name will be SYSCO1. The Node ID allocated in this example is 9001. It is entered in the member definition, as shown below in the expanded group:
Note:
The daemon job (SYSCO1) must specify DDCARD input for
PRODUCT=CAS. This defines the services that will operate
in the daemon job.
16:29:29 ***** A D A B A S SYSTEM COORDINATOR 7.4.2 (I004) ***** 2004-03-03
- System Coordinator Group Members - C11260M1
Runmode: Local Session: Local
Group Name: TESTSING Cluster Facility Name:
SVC ID: 253 Operating System : Single
Member
Purge(P) Job Name Node ID
_ SYSCO10 9010 <== End of List
Command ==>
Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12
Help Exit Refr Upd Add Menu |
Next, use SYSCOR to set the System Coordinator job parameters for the application jobs and TP systems that are to use Adabas Transaction Manager in your system. Refer to the Adabas System Coordinator documentation for details. In this case you can set the parameter “Managed by daemon” to “N”.
Now you must use SYSATM to define job parameters for all the client applications that are to use Adabas Transaction Manager in your system - in this example, a standard CICS job with started task name CICTSING. At runtime, this CICS system produces static Adabas clients managed by the local Adabas System Coordinator (without help from the daemon). Default parameter settings are often sufficient (and can be modified later if necessary), but there are certain parameters that need to be entered to ensure that Adabas Transaction Manager will be active for the named job. Where ATM’s transaction management is to be activated for a job for the first time, you are asked to add a new set of job parameters in SYSATM. Here you must first identify the job name and the type. The job type allows Adabas Transaction Manager to assume suitable defaults for most parameters and be ready to use the correct operating system or TP system interfaces at runtime. In our example, the job name is CICTSING and the type is CICS (not CICS Cluster), as follows:
16:32:41 Add 2004-03-03
Job Parameters F11310MC
Job Name: CICTSING
(D = Default for Job Type)
_ Batch
_ COM-PLETE
_ CICS Cluster
X CICS
_ IMS/DC
_ UTM
_ TSO
_ CMS
_ TIAM
_ None above
Mark to Select a Job Type
Command ==>
PF1 Help PF3 Exit |
Refer to the section Job Parameters for details of job parameters and how to set them. Default values will suffice for some of the parameters, but you must specify appropriate values for the following parameters:
ATM - Activate ATM Processing: Set to
ON.
SVC - SVC Number: Provide the correct SVC
number. (Not required in BS2000 systems.)
CORGROUP - System Coordinator Group name:
Provide the name of the System Coordinator group of the local System
Coordinator daemon – TESTSING in this example.
A multi-system is one in which multiple operating system images are used in conjunction with each other. These system images must be connected by Software AG's Entire Net-Work product. In these cases, it is likely that an application running on one system will change Adabas databases executing on more than one of the system images. An ATM daemon executes in each system image. The daemons communicate with each other in managing the Adabas changes that are made around the network.
The example will use IMAGE1 and IMAGE2. Only static clients are used, so the local Adabas System Coordinator does not need the help of the daemon to manage its client sessions. Each connected system image must run its own instance of the Adabas System Coordinator daemon. The daemons are used solely to provide services to the ATM daemons.
Here are the steps that you take:
Define an Adabas System Coordinator group, for example, TESTMULT.
Acquire/allocate a Node ID for each member (one per image), for example nodes 9010 and 9011 for systems IMAGE1 and IMAGE2.
Define a member of the group for each system image, for example, SYSCO10 and SYSCO11.
Specify the Adabas System Coordinator group in which the ATM daemons will operate. This example uses the group TESTMULT.
Define the static client jobs for which Adabas Transaction Manager is to provide transaction coordination, for example, job CICTMULT.
Below is the SYSCOR definition of Adabas System Coordinator Group TESTMULT using SVC number 253; the system type is Standard (Multi-system images). Cluster Facility name is not required since this is only required for running in SYSPLEX mode.
Note:
All members of an Adabas System Coordinator group must use the same
SVC number at runtime.
16:38:44 Modify 2004-03-03
System Coordinator Group Member C11230M1
Group Name: TESTMULT SVC ID: 253
System Type: - Standard (Single-system image)
(Mark one) X Standard (Multi-system images)
_ Sysplex (IBM Parallel Sysplex)
Cluster Facility Name : ________________
Automatic Pool Recovery: Y
Command ==>
PF1 Help PF3 Exit PF5 Upd
|
The following shows the member definitions of the group when it has been expanded in SYSCOR.
Note:
The member names must exactly match the job names of the Adabas
System Coordinator daemons.
16:39:23 ***** A D A B A S SYSTEM COORDINATOR 7.4.2 (O004) ***** 2004-03-03
- System Coordinator Group Members - C11260M1
Runmode: Local Session: Local
Group Name: TESTMULT Cluster Facility Name:
SVC ID: 253 Operating System: Multi
Member
Purge(P) Job Name Node ID
_ SYSCO10 9010 <== Top of List
_ SYSCO11 9011 <== End of List
________ _____
________ _____
Command ==>
Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12
Help Exit Refr Upd Add Menu
|
As in the single system example, use SYSCOR to set the System Coordinator job parameters for the application jobs and TP systems that are to use Adabas Transaction Manager in your system. In this case you can set the parameter “Managed by daemon” to “N”.
As in the single system example, you must now use SYSATM to define job parameters for all the client applications that are to use Adabas Transaction Manager in your system. Be sure that the job parameters for each job are stored in a system file which is accessible from the system image in which the job executes.
The following are examples of technologies that offer dynamic transaction routing (DTR) in a single system image:
CICS/MRO
IMS TM
UTM
Note:
The activation and use of DTR in the technologies listed above is
under the control of the system administrator. You may be able to use these
technologies without necessarily using DTR. Please be sure to check.
DTR is the most flexible implementation of load balancing and fault tolerance for these technologies. This is where multiple jobs run together to provide a single service. We refer to DTR-enabled technologies as clustered applications. Clustered applications allow client sessions to move from running in one job to another (within the same service) at any time a message pair completes. Consequently, Adabas Transaction Manager, Adabas Vista, Adabas Fastpath and Adabas SAF Security must all be ready to react to this event, on demand. The Adabas System Coordinator provides an internal service to enable DTR support for these products.
Here are the steps that you take if you wish to use Adabas Transaction Manager’s transaction coordination in DTR jobs within a single system:
Define an Adabas System Coordinator group, for example, TESTDTR.
Acquire/allocate a Node ID for the daemon, for example, 9020.
Define the member of the group, for example, member SYSCO20.
Specify the Adabas System Coordinator group in which the ATM daemon will operate - TESTDTR in this example.
Define the client jobs that are to use Adabas Transaction Manager, for example, job name CICSDTR*; that includes jobs CICSDTR1 and CICSDTR2, that run together as a single DTR service.
Below is the definition of Adabas System Coordinator Group TESTDTR using SVC number 253. The System Type is Standard (Single-system image). Cluster Facility name is not required since this is only required for running in SYSPLEX mode:
17:39:46 Modify 2004-03-03
System Coordinator Group Member C11230M1
Group Name: TESTDTR SVC ID: 253
System Type: X Standard (Single-system image)
(Mark one) - Standard (Multi-system images)
_ Sysplex (IBM Parallel Sysplex)
Cluster Facility Name : ________________
Automatic Pool Recovery: Y
Command ==>
PF1 Help PF3 Exit PF5 Upd
|
The following shows the example member definition for the group expanded in SYSCOR:
17:42:08 ***** A D A B A S SYSTEM COORDINATOR 7.4.2 (I004) ***** 2004-03-03
- System Coordinator Group Members - C11260M1
Runmode: Local Session: Local
Group Name: TESTDTR Cluster Facility Name:
SVC ID: 253 Operating System: Single
Member
Purge(P) Job Name Node ID
_ SYSCO20 9020 <== End of List
________ _____
________ _____
Command ==>
Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12
Help Exit Refr Upd Add Menu |
Next, use SYSCOR to set the System Coordinator job parameters for the application jobs and TP systems that are to use Adabas Transaction Manager in your system. Refer to the Adabas System Coordinator documentation for details. The parameter “Managed by daemon” must be set to “Y” for any TP system that will use dynamic transaction routing, such as CICS/MRO.
As in the above examples, you must now use SYSATM to define job parameters for all the client applications that are to use Adabas Transaction Manager in your system. Select the correct job type for your clustered application environment, in this example, CICS Cluster. The wildcard (*) is used to reduce the number of job definitions required. You must also supply the name of the Adabas System Coordinator group which controls this cluster, and a service name for the cluster. The group must already have been defined using SYSCOR. In this example, the name CICSDTR has been chosen for the cluster service. Set ATM job parameters, as described for the case of a single system with static clients.
Note:
It is important that all jobs of the same service have an identical
setting for Clustered Application Service Name, especially when the wildcard
option is not used. This is the only thing that relates jobs together as a
single service. In this example, the cluster that we identify by service name
CICSDTR consists of a number of CICS jobs, each of which executes with a job
name CICSDTR with a single-character suffix.
07:57:12 Add 2004-03-04
Job Parameters T11100M3
Job Type: CICS Cluster
Job Name: CICSDTR*
(D = Default for Job Type)
ATM ON/OFF for Job: ON
----------- Daemon Mode ------------
(Usually for Clustered Applications)
Service Name: CICSDTR
Coordinator Group Name: TESTDTR
------------------------------------
***********************
* PF5 to Confirm Add *
***********************
Command ==>
PF1 Help PF3 Exit |
CICS in a Parallel Sysplex is an example of a technology that offers dynamic transaction routing (DTR) in a Clustered Operating System running in multiple images.
Note:
The activation and use of DTR in these technologies is under the
control of the system administrator. You may be able to use these technologies
without necessarily using DTR. Please be sure to check.
DTR is the most flexible implementation of load balancing and fault tolerance for these technologies. This is where multiple jobs run together to provide a single service. We refer to DTR-enabled technologies as clustered applications. Clustered applications allow client sessions to move from running in one job to another (within the same application service) at any time a message pair completes. Consequently, Adabas Transaction Manager, Adabas Vista, Adabas Fastpath and Adabas SAF Security must all be ready to react to this event, on demand. The Adabas System Coordinator provides an internal service to enable DTR support for these products.
In a SYSPLEX configuration it is possible for a client session to be routed from one system image to another within the SYSPLEX. In order to facilitate this DTR, the Clustered Application Service running in the Adabas System Coordinator daemons must communicate in order to negotiate the transfer of the client session context from one system image to the other. This system level communication is assisted by use of the IBM Coupling Facility.
Here are the steps that you take if you wish to use Adabas Transaction Manager in DTR jobs within a SYSPLEX:
Define a Cache Structure in the Coupling Facility, for example, TESTMDTR-CFN.
Define an Adabas System Coordinator group, for example, TESTMDTR.
Acquire/allocate a Node ID for each member, for example, nodes 9030 and 9031.
Specify the Adabas System Coordinator group in which the ATM daemons will operate. This example uses the group TESTMDTR, defined as above.
Define the members of the group, for example, members SYSCO30 and SYSCO31.
Define the client jobs that are to use Adabas Transaction Manager. In this example we make a SYSPLEX DTR definition, with jobs CICMDTR1 and CICMDTR2 working together as a single service.
Below is the SYSCOR definition of Adabas System Coordinator Group TESTMDTR using SVC number 253; the System Type is SYSPLEX (IBM Parallel Sysplex). The IBM Coupling Facility is used in this configuration. In the example, this is a cache structure called TESTMDTR-CFN which must have been defined by your system administrator.
07:58:54 Modify 2004-03-03
System Coordinator Group Member C11230M1
Group Name: TESTMDTR SVC ID: 253
System Type: - Standard (Single-system image)
(Mark one) - Standard (Multi-system images)
X Sysplex (IBM Parallel Sysplex)
Cluster Facility Name : ________________
Automatic Pool Recovery: Y
Command ==>
PF1 Help PF3 Exit PF5 Upd
|
The following shows the member definitions of the expanded group in SYSCOR.
Note:
The member names must exactly match the job names of the Adabas
System Coordinator daemons.
07:59:58 ***** A D A B A S SYSTEM COORDINATOR 7.4.2 (I004) ***** 2004-03-04
- System Coordinator Group Members - C11260M1
Runmode: Daemon / 9020 Session: Daemon / 9020
Group Name: TESTMDTR Cluster Facility Name: TESTMDTR-CFN
SVC ID: 253 Operating System: Multi
Member
Purge(P) Job Name Node ID
_ SYSCO30 9030 <== Top of List
_ SYSCO31 9031 <== End of List
________ _____
________ _____
Command ==>
Enter-PF1---PF2---PF3---PF4---PF5---PF6---PF7---PF8---PF9---PF10--PF11--PF12
Help Exit Refr Upd Add Menu |
Next, use SYSCOR to set the System Coordinator job parameters for the application jobs and TP systems that are to use Adabas Transaction Manager in your system. Refer to the Adabas System Coordinator documentation for details. The parameter “Managed by daemon” must be set to “Y” for any CICS/PLEX system that will use dynamic transaction routing.
Next, use SYSATM to define job parameters for all the CICS/PLEX jobs that are to run together as a clustered service. Select the correct job type for your clustered application environment, in this example, CICS Cluster. The wildcard (*) is used to reduce the number of job definitions required. You must also supply the name of the Adabas System Coordinator group which controls this cluster, and a service name for the cluster. The group, TESTMDTR in this example, must already have been defined using SYSCOR. In this example, the name CICSMDTR has been chosen for the cluster service. Set ATM job parameters, as described for the case of a single system with static clients.
Note:
It is important that all jobs of the same service have an identical
setting for Clustered Application Service Name, especially when the wildcard
option is not used. This is the only setting that relates jobs together as a
single service.
08:05:17 Add 2004-03-04
Job Parameters T11100M3
Job Type: CICS Cluster
Job Name: CICSDTR*
(D = Default for Job Type)
ATM ON/OFF for Job: ON
----------- Daemon Mode ------------
(Usually for Clustered Applications)
Service Name: CICSDTR
Coordinator Group Name: TESTDTR
------------------------------------
***********************
* PF5 to Confirm Add *
***********************
Command ==>
PF1 Help PF3 Exit |
