Hallo,
das ist ein Systemjob. Hier etwas erklärt: --> http://www.redbooks.ibm.com/redbooks/pdfs/sg242161.pdf
QCMNARB System Value Setting
Work that was done in the QSYSARB system job for APPC is moved out of
QSYSARB and into communications arbiter jobs. These communications
arbiters start when the system is IPLed. They are named QCMNARB01 through
QCMNARB12.
There is one QCMNARBnn job per processor on the system. For example, on a
12-way processor, there are jobs named QCMNARB01 through QCMNARB12.
The exception is that single processor systems have QCMNARB01 and
QCMNARB02.
In addition, the APPN automatic creation, deletion, and vary on and off
processing of APPN controllers and devices that was done by the QLUS system
job is now performed in the communications arbiter jobs.
Note:
Throughout this chapter, the reference to APPN controllers and devices
indicates objects created when the APPC controllers and devices indicate
APPN(*YES).
The QCMNARB system value specifies the number of communications arbiter
jobs that are available to process APPC communications. The QCMNARB
setting can affect the performance at startup, takedown, and during error
recovery for APPC communications and APPN autoconfiguration. The first time
an APPC controller is varied on after an IPL, it is assigned to a communication
arbiter job. On systems with many APPC controllers and devices, more
QCMNARB jobs can result in improved APPC communication performance.
If QCMNARB is set to zero, the system functions as systems prior to V4R2. That
is, the work is performed in QSYSARB and QLUS, not in the communication
arbiters.
Recommendation
Set the QCMNARB system value to a non-zero setting. It is also acceptable
to leave it at the default value of *CALC, which typically results in a non-zero
setting.
On multi-processor systems, a setting of *CALC results in one communication
arbiter job for each processor on the system.
The system maintains a count of objects for each QCMNARB job and attempts to
assign controllers to the communication arbiter job that is serving the
least
number of objects. This balances the amount of work that each QCMNARBnn
arbiter job must perform. All devices that are attached to an APPC controller
are serviced by the arbiter job to which the controller is assigned.
To determine which communication arbiter is assigned to a particular APPC
controller, use the Display Controller Description (DSPCTLD) command and
locate the QCMNARBnn system job that handles recovery for that controller and
its devices. An example is shown in Figure 54 on
page
183.


Display Controller Description
SYSTEMXX
02/27/98 20:27:22
Controller description . . . . . . : CTLD CTLD0001
Option . . . . . . . . . . . . . . : OPTION *BASIC
Category of controller . . . . . . : *APPC
Link type . . . . . . . . . . . . : LINKTYPE *LAN
Online at IPL . . . . . . . . . . : ONLINE *YES
Character code . . . . . . . . . . : CODE *EBCDIC
Maximum frame size . . . . . . . . : MAXFRAME 16393
Current maximum frame size . . . . : 521
Remote network identifier . . . . : RMTNETID SYSTEMSXP
Remote control point . . . . . . . : RMTCPNAME SYSTEMDMT
Initial connection . . . . . . . . : INLCNN *DIAL
Dial initiation . . . . . . . . . : DIALINIT *LINKTYPE
Switched disconnect . . . . . . . : SWTDSC *NO
Data link role . . . . . . . . . . : ROLE *NEG
LAN remote adapter address . . . . : ADPTADR 08005A202722
LAN DSAP . . . . . . . . . . . . . : DSAP 04
LAN SSAP . . . . . . . . . . . . . : SSAP 04
Autocreate device . . . . . . . . : AUTOCRTDEV *ALL
System job . . . . . . . . . . . . : QCMNARB01
Text . . . . . . . . . . . . . . . : TEXT AUTOMATICALLY CREATED BY SYSTEM
Press Enter to continue. Bottom
F3=Exit F11=Nondisplay keywords F12=Cancel


Figure 54. Communication
Arbiter Job
Assigned to the
Controller
If there are APPC controllers that have non-APPC devices attached to them, the
recovery for that controller and its devices continue to execute in QSYSARB.
The same applies to V4R2 systems. That is, only APPC controllers with APPC
devices attached take advantage of the multiple communication arbiters function.