Daemon Runtime Parameters

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.
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.

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.

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: AFP: Adabas Fastpath Asynchronous Buffer Manager ATM: Adabas Transaction Manager AVI: Adabas Vista daemon component DTR: Dynamic Transaction Routing Service	AFP ATM AVI DTR	none

Parameter

Use

Possible Values

Default

PRODUCT

Specifies which product services are to be made available by Adabas System Coordinator:

AFP: Adabas Fastpath Asynchronous Buffer Manager
ATM: Adabas Transaction Manager
AVI: Adabas Vista daemon component
DTR: Dynamic Transaction Routing Service

AFP
ATM
AVI
DTR

none

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

Sites that use Adabas Fastpath will also require PRODUCT=AFP. Sites that use Adabas Vista or Adabas Transaction Manager and wish to support dynamic transaction routing in a clustered application will require PRODUCT=AVI and/or PRODUCT=ATM.

START– Cold start feature

Parameter Use Possible Values Default

START

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 Software AG 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

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 Software AG 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