The following parameters can be entered using DDCARD input. The PRODUCT parameter is mandatory. All other parameters are optional.

Parameter	Usage
CT	Command timeout limit.
DSPSCOPE	Specify the type of dataspaces used by Adabas System Coordinator and Adabas Fastpath.
ENCRYPTION	Support encrypted daemon datasets.
FORCE	Overwrite ID table entry.
LOCAL	Define an isolated daemon.
LU	Length of intermediate user buffer.
MPMWTO	Display information messages.
NABS	Number of attached buffers.
NC	Number of command queue elements.
NXC	Number of sysplex command queue elements
PRODUCT	Identify the services to be made available. Mandatory.
START– Cold start feature	Delete shared memory from previous execution.
ZIIP	Activate zIIP support for the System Coordinator Daemon.

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CT – Command Timeout Limit

Parameter	Use	Mimimum	Maximum	Default
CT	The maximum number of seconds (more precisely, units of 1.048576 seconds) that can elapse from the time a daemon request is completed until the results are retrieved by the sender through the interregion communication.	1	16,777,215	60

This parameter is used to prevent a request queue element (RQE) and attached buffer from being held indefinitely when a user with an outstanding request terminates abnormally.

Possible causes of a command timeout are

• address space is swapped out or cannot be dispatched;

• the task is cancelled or ABENDed;

• the task has low priority in a high-activity system.

DSPSCOPE – Dataspace Scope

Parameter	Use	Possible Values	Default
DSPSCOPE	Specify the type of dataspaces used by Adabas System Coordinator and Adabas Fastpath.	ALL | COMMON	ALL

From z/OS 2.4 and above, DSPSCOPE must be set to ALL to enable the continued use of dataspaces due to z/OS enforcing the DIAGxx parmlib statement ALLOWUSERKEYCADS(NO).

This parameter is used by:

• The Adabas System Coordinator daemon when it is defined to use a dataspace for its shared memory latency/pulse services (refer to Daemon latency/pulse services).

• The Adabas Fastpath buffer when it is defined to use a dataspace (refer to the Dataspace Name Adabas Fastpath buffer parameter).

Important Note:

The following fixes must be applied and active in all components (client, daemon, database) across all systems (LPARs) before the use of DSPSCOPE=ALL is considered for any daemon within a group involving those systems:

Product	Version	Fix Number
Adabas System Coordinator	8.6 SP1	None
	8.3 SP1	MI831003, MI831004
Adabas Fastpath	8.6 SP1	None
	8.2 SP2	AW822058

ENCRYPTION - Activate Support for Encrypted Datasets

Parameter	Use	Possible Values	Default
ENCRYPTION	Specify whether to activate support for encryption.	YES | NO	NO

The ENCRYPTION parameter controls whether the Adabas System Coordinator Daemon supports encrypted datasets.

If ENCRYPTION=NO is specified (the default), the Adabas System Coordinator Daemon does not support encrypted datasets. In this case, if a dataset is encrypted, the Adabas System Coordinator Daemon will terminate with an error when it attempts to open the dataset.

Setting ENCRYPTION=YES is required if one or more of the datasets accessed by the Adabas System Coordinator Daemon are encrypted (such as the Adabas Transaction Manager TMRFI recovery file).

If multiple daemons share an encrypted dataset in a group, then ENCRYPTION must be set to YES for all daemons in the group.

FORCE – Overwrite ID Table Entry

Parameter	Use	Possible Values	Default
FORCE	Specify whether or not this daemon is to force an entry into the active node list.	YES | NO	NO

Possible values:

• FORCE=YES: Force an active entry, if one is available.

  FORCE=YES is usually not required. However, it may be needed if the previous daemon session ended abnormally, leaving the old entry in the active node list. Use this setting carefully.

• FORCE=NO: Causes an error if the node used by this daemon already appears in the active node list.

LOCAL - Define an Isolated Daemon

Parameter	Use	Possible Values	Default
LOCAL	Specify whether or not a daemon is to be isolated from other Entire Net-Work nodes.	YES | NO	NO

Possible values:

• LOCAL=YES: Isolates this daemon from other Entire Net-Work nodes.

• LOCAL=NO: The daemon can receive calls from other Entire Net-Work nodes.

LU – Length of Intermediate User Buffer

Parameter	Use	Mimimum	Maximum	Default
LU	Set the size of the intermediate user buffer area.	4000	65,535	65,535

The size specified must be large enough to accommodate all control information for commands passed to the node.

An error occurs if the LU parameter specifies a value greater than the byte count implied by the NAB parameter. If you change either parameter value, you may have to change them both.

MPMWTO – Display Information Messages

Parameter	Use	Possible Values	Default
MPMWTO	Specify whether or not to display information level (l-level) messages.	YES | NO	NO

By default, information level (I-level) messages are suppressed.

NABS – Number of Attached Buffers

Parameter	Use	Mimimum	Maximum	Default
NABS	Specify the number of attached buffers to be used.	0	500,000	16

An attached buffer is an internal buffer used for communication with the daemon.

For Adabas System Coordinator, this is an optional parameter that defines the number of attached buffers to be used for receiving requests from clients or from other daemon peers.

An attached buffer pool is allocated with a size equal to the value of the NABS parameter multiplied by 4096 bytes.

NC - Number of Command Queue Elements

Parameter	Use	Mimimum	Maximum	Default
NC	Set the maximum number of command queue elements.	20	32,767	100

The maximum number of command queue elements (CQEs) that can be processed simultaneously by this daemon.

NXC - Number of Sysplex Command Queue Elements

Parameter	Use	Mimimum	Maximum	Default
NXC	Set the maximum number of queue elements in the sysplex messaging command queue.	1	4096	256

This parameter is used only for multi-system daemons using XCF messaging, or for full Parallel Systems daemons using dynamic transaction routing (DTR). Although the default value will be sufficient for most sites, the number will dynamically expand as required when there is a high volume of XCF messages.

PRODUCT - Identify the Services to be made Available

Parameter	Use	Possible Values	Default
PRODUCT	Specifies which product services are to be made available by Adabas System Coordinator: AAF: Adabas SAF Security AFP: Adabas Fastpath Asynchronous Buffer Manager ATM: Adabas Transaction Manager AVI: Adabas Vista daemon component DTR: Dynamic Transaction Routing Service	AAF AFP ATM AVI DTR	none

This parameter is used once for each service that is to be made available by the daemon.

Possible values:

• PRODUCT=AAF:

  Enable the daemon services necessary to support Adabas SAF Security for the protection of online administration of COR-based Add-on products.

• PRODUCT=AFP:

  Enable the daemon services necessary to support the Adabas Fastpath Asynchronous Buffer Manager. This is mandatory for sites using Adabas Fastpath.

• PRODUCT=ATM:

  Enable the daemon services necessary to support Adabas Transaction Manager. This is mandatory for sites using Adabas Transaction Manager.

• PRODUCT=AVI:

  Enable the daemon services necessary to support Adabas Vista daemon-managed jobs such as those defined to use activity pulsing or those defined to run in dynamic transaction routing systems (eg. CICS/MRO, CICS/PLEX, and IMS).

• PRODUCT=DTR:

  Note
  PRODUCT=DTR previously replaced PRODUCT=CAS but parameter support for PRODUCT=CAS has been retained for backward compatibility.

  This is an optional dummy parameter used simply to identify that dynamic transaction routing systems (eg. CICS/MRO, CICS/PLEX, and IMS) are being managed by this daemon.

START– Cold start feature

Parameter	Use	Possible Values	Default
START	Normally, the daemon inherits and reuses shared memory allocations from a previous execution. Specify START=COLD to skip this recovery processing. Note START=COLD is normally only used when advised by support to avoid start-up problems related to auto-recovery from previous executions. If there is a risk of daemons unnaturally terminating across an IPL then START=COLD should be used when restarting them.	COLD	none

ZIIP – Activate zIIP support for the System Coordinator Daemon

Parameter	Use	Possible Values	Default
ZIIP	Specify whether or not zIIP support is to be activated for this Daemon.	YES | NO	No

Possible values:

• ZIIP=YES:

  zIIP support for the Daemon is activated. The Daemon offloads CPU time from the general processors to System z Integrated Information Processors (zIIP). The purpose of this configuration is to reduce the CPU consumption on the general processors.

• ZIIP=NO:

  The default setting.

  The Daemon runs without the option to offload CPU time to zIIPs.

Dynamic Modification

If the Daemon was started with ZIIP=YES, the setting of the ZIIP parameter can be changed at runtime - that is, set to NO and subsequently back to YES - using the ZIIP= command from the operator console. If the Daemon was started with ZIIP=NO, the setting of the ZIIP parameter cannot be changed to YES later in this session.

Refer to Daemon Operator Commands for more information on the ZIIP= operator command.