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by Jayaram and S Shashikala
Commercial
Systems Division Enhancements Summary | |
Previously MPE/iX had one job queue into which all the submitted
jobs went before getting launched by the dispatcher. Often this
proved to be a hindrance, as a few long jobs could prevent a lot
of short jobs from running. MPE/iX can now have up to 255 user-defined job queues, each
having a separate limit on the number of runnable jobs. Users can
specify the queue to which their jobs should log on by using the
newly added ;jobq= parameter of !job command or !stream command. There will be one default job queue named HPSYSJQ, which will be created during the system bootup. Three new commands have been added: NEWJOBQ, PURGEJOBQ and LISTJOBQ LIMIT, ALTJOB, JOB and STREAM commands now have a new parameter, ;jobq= . LIMIT command can now be used to increment or decrement
the limit values. NEWJOBQ and PURGEJOBQ commands accept only alphanumeric characters for
queue name. A queue name longer than 8 characters will not be accepted. STREAM, JOB, LIMIT, ALTJOB commands accept only alphanumeric characters for
;JOBQ= parameter. A queue name longer than 8 characters will
not be accepted. SHOWJOB #Jnn;JOBQ is a valid command.
New Commands | |
Syntax: The NEWJOBQ command creates a new job queue. SM/OP capability
is required to execute this command. Limit is the only queue controlling property. The jobs in the
queue are sorted by their INPRI. In case of a tie for INPRI, jobs are sorted by their INTRO time. The global limit takes precedence over individual queue limits.
That is, even if a jobq has a slot available, if the overall limit
has been reached, jobs have to wait until one of the jobs finishes
or the global limit is increased. When a global slot becomes available,
the next job is picked from among the eligible jobqs (those which
haven't yet reached their individual limits) using the
following algorithm: Across all job queues, the highest
INPRI job is selected. In case of a tie for INPRI, the one which was introduced earliest is selected. There
cannot be a tie in INTRO time. The job queues do not persist across reboots, unless
a START RECOVERY is done. Any other system starts will cause the
job queues to be deleted and they will have to be created again. This command is available in a session, job, or
in BREAK. Pressing [Break] has no effect on this command. This command is not allowed
in SYSSTART.
Parameters: - qname
Name of the queue to be created. Queuename can contain
only alphanumeric characters. Queuename can be up to 8 characters
in length; longer names will not be accepted. If a queue of this
name already exists, an error is returned. - limit
Maximum number of jobs that can be allowed in this
queue. The limit value can be changed using the :limit [+-]n;jobq= command. If omitted, a value of zero is assumed.
Examples: :NEWJOBQ MYJOBQ;limit=100 |
Syntax: PURGEJOBQ qname The PURGEJOBQ command deletes a job queue. The queue will be
deleted only if it is empty, that is, if no jobs are waiting or
executing in the queue. The default system job queue can not be
purged. The user must have SM/OP capability to execute the command.This command
is available in a session, job, or in BREAK. Pressing [Break] aborts the execution of this command. This command is
not allowed in SYSSTART. Parameters: - qname
Name of the queue to be deleted.
Examples: Syntax: The LISTJOBQ command allows the user to list all the existing
job queues in the system. It displays the queue name, limit, number
of jobs in the queue that are in the EXEC state and the total number
jobs in the queue, (No. of jobs in the EXEC state + No. of jobs
in the WAIT state). This command is not allowed in SYSSTART. Examples: :listjobq
JOBQ LIMIT EXEC TOTAL
HPSYSJQ 3500 1 1
MYJOBQ 100 1 1
MJQ 10 1 2 |
Modified Commands | |
Syntax: LIMIT [{ + }] [{,numbersessions }] |
{ - } {numberjobs,numbersessions} |
The LIMIT command allows users with OP capability to change the
job and session limits. As a result of this enhancement, it can
be used to change the limit value of individual job queues. The LIMIT command now accepts a new parameter ;jobq= . It also accepts '+' or '-' before
the numeric values to indicate increment or decrement. Parameters: - qname
Name of the job queue whose limit is to be changed.
If the queue name is not specified, LIMIT command will alter the global limit values. - +/-
If +/- is specified before the numeric value, the
corresponding limit value will be incremented/decremented.
Examples: : LIMIT 60;jobq=myjobq { Set the limit of MYJOBQ to 60} : LIMIT -1;jobq=myjobq { Decrement the limit by 1} : LIMIT +1 { increment the global job limit by 1} |
Syntax: JOB [jobname,]username[/userpass].acctname[/acctpass]
[,groupname[/grouppass]]
[;TIME=cpusecs]
{BS}
{CS}
[;PRI= ] {DS}
{ES} [{;INPRI=inputpriority}]
{;HIPRI } [;RESTART] [;OUTCLASS=[device][,outputpriority[,numcopies]]] [;TERM={termtype}]
[;PRIVATE]
[;SPSAVE] |
[;JOBQ= <qname>] The JOB command now accepts a new parameter ;jobq=. Users can specify the job queue name into which a particular
job should logon. If a job queue is specified in the STREAM command, then it overrides the name specified
in the JOB command. If no queue name is specified, the default system
job queue is used (HPSYSJQ). Parameters: - qname
Name of the queue into which the job should logon.
Examples: :JOB foo,manager.sys;jobq=myjobq |
Syntax: ALTJOB [JOB=] {#Jnnn}
{#Snnn} [[;INPRI=]inputpriority] [[;OUTDEV=]{ldev }]
{devclass} [;JOBQ=qname] [;HIPRI] |
ALTJOB alters the attributes of waiting or scheduling
jobs. ALTJOB now accepts a new parameter ;jobq=. Jobs waiting or executing in a queue can moved to
other queues. Only users with SM/OP capability can move jobs. When an executing job is moved, the limit of the target queue
is ignored and the job continues to execute in the new queue. A
waiting job continues to wait in the new queue if the queue has
already reached its limit. The ALTJOB command now accepts a new optional parameter HIPRI. The HIPRI option can be used for overriding the system jobfence
or the joblimit. User must have System Manager(SM) or Operator(OP)
capability to use this option. Also, the INPRI and HIPRI options may not be specified together. Parameters: - qname
Name of the job queue into which the job is to be
moved. - HIPRI
HIPRI option can be used to change the priority of a job.
Examples: :ALTJOB #jnnn;jobq=mjq :ALTJOB #jnnn;hipri |
Syntax: STREAM [filename] [,char] [;AT = timespec] [;DAY = {day-of-week }
{day-of-month }
{day-until-month} ] [;DATE = datespec] [;IN = [days[, [hours] [,minutes]]]] [;JOBQ = qname] The STREAM command now accepts a new parameter ;jobq=. User can specify the queue name into which a
particular job should go. The name specified overrides the queue
name specified in the JOB command. Parameters: - qname
The name of the queue into which the job must logon.
If no queue name is specified the default system job queue will
be used (HPSYSJQ).
Examples: STREAM FOO; jobq=myjobq Syntax: [[#]Snnn ]
[[#]Jnnn ]
SHOWJOB [STATUS ][;JOBQ][;*listfile]
[SCHED ]
[item[;item[;...]]] The SHOWJOB command displays status information about jobs/sessions.
It now accepts a new parameter ;JOBQ which indicates the queue name to which the job belongs.
If the ;JOBQ option is not specified, the SHOWJOB output is the same as before. A new field JOBQ is added to the showjob output format. The JLIST field in the showjob output format displays only
5 characters. In addition, the SCHEDULED-INTRO heading changes to SCHED-INTRO, in the showjob output format when the JOBQ option is used. Examples: 1. :SHOWJOB;jobq
New field
JOBNUM STATE IPRI JLIST JOBQ INTRODUCED JOB NAME
#J3 EXEC LP HPSYSJQ WED 11:46A FTPMON,FTP.SYS
#J7 EXEC LP SYSMGRQ WED 5:47P EMG,MGR.SYSMGR
#S81 EXEC 34 THU 12:17P MGR.GOPI 2. To display a particular job and job queue name, enter :SHOWJOB #J7;JOBQ JOBNUM STATE IPRI JIN JLIST JOBQ INTRODUCED JOB NAME #J7 EXEC 2 LP SYSMGRQ WED 5:47P EMG,MGR.SYSMGR JOBFENCE= 7; JLIMIT= 10; SLIMIT= 60 3. To display all scheduled jobs with job queue name,
enter :SHOWJOB ;JOBQ JOBNUM STATE IPRI JIN JLIST JOBQ INTRODUCED JOB NAME #J2 EXEC 10S LP HPSYSJQ TUE 2:50P JINETD,MANAGER.SYS
#S2 EXEC 20 20 TUE 2:53P KISHORE,MANAGER.SYS
#S4 EXEC 2 2 TUE 3:25P SHASHI,MANAGER.SYS 3 JOBS (DISPLAYED):
0 INTRO
0 WAIT; INCL 0 DEFERRED
3 EXEC; INCL 2 SESSIONS
0 SUSP
JOBFENCE= 7; JLIMIT= 60; SLIMIT= 60 CURRENT: 5/11/99 15:25 JOBNUM STATE IPRI JIN JLIST JOBQ SCHED-INTRO JOB NAME #J3 SCHED 8 10S LP MJQ 5/11/99 19:00 JAY,MANAGER.SYS
1 SCHEDULED JOB(S) |
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