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Commands Reference, Volume 6
wlmassign command
Purpose
Manually assigns processes to a Workload Management class or cancels prior
manual assignments for processes.
Syntax
wlmassign [ -s | -S ] [
-u | Class_Name ] [ PID_List ] [ -g Pgid_List ]
Description
The wlmassign command:
- Assigns a set of processes specified by a list of process identifiers
(pids) and/or process group identifiers (pgids) to a specified superclass
or subclass or both, thus overriding the automatic class assignment or a
prior manual assignment.
- Cancels a previous manual assignment for the processes specified in pid_list or pgid_list.
The wlmassign command allows to specify processes
using a list of PIDs, a list of pgids, or both. The format of these lists
is:
pid[,pid[,pid[...]]]
or
pgid[,pgid[,pgid[...]]]
The name of a valid superclass or subclass must be specified to manually
assign the target processes to a class. If the target class is a superclass,
each process is assigned to one of the subclasses of the specified superclass
according to the assignment rules for the subclasses of this superclass.
A manual assignment remains in effect (and a process remains in its manually
assigned class) until:
- The process terminates
- Workload Management (WLM) is stopped. When WLM is restarted, the manual
assignments in effect when WLM was stopped are lost.
- The class the process has been assigned to is deleted
- A new manual assignment overrides a prior one.
- The manual assignment for the process is canceled using the -u flag.
- The process calls the exec() routine.
The name of a valid superclass or subclass must be specified to manually
assign the target processes to a class. The assignment can be done or canceled
at the superclass level, the subclass level or both. When a manual assignment
is canceled for a process, or the process calls exec(),
the process is then subject to automatic classification; if inheritance is
enabled for the class that the process is in, it will remain in that class,
otherwise the process will be reclassified according to the assignment rules.
The interactions between automatic assignment (inheritance and rules), inheritance
and manual assignment are detailed in the concept
article in AIX 5L Version 5.2 System Management Concepts: Operating System and Devices.
For a manual assignment:
- If the Class_Name is the name of a superclass,
the processes in the list are assigned to the superclass. The subclass is
then determined, for each process, using the assignment rules for the subclasses
of the target superclass.
- If the class name is a subclass name (supername.subname), the processes
by default are assigned to both the superclass and the subclass. The processes
can be assigned to the superclass only by specifying the -S flag or the subclass only by specifying the -s flag.
wlmassign super1.sub2 -S pid1
is equivalent to:
wlmassign super1 pid1
To assign a process to a class or cancel a prior manual assignment, the
user must have authority both on the process and on the target class. These
constraints translate into the following:
- The root user can assign any process to any class.
- A user with administration privileges on the subclasses of a given superclass
(that is, the user or group name matches the user or group names specified
in the attributes adminuser and admingroup of the superclass) can manually reassign any process from one of the
subclasses of this superclass to another subclass of the superclass.
- Users can manually assign their own processes (same real or effective
user ID) to a class, for which they have manual assignment privileges (that
is, the user or group name matches the user or group names specified in the
attributes authuser and authgroup of
the superclass or subclass).
This defines 3 levels of privilege among the persons who can manually assign
processes to classes, root being the highest. For a user to modify or terminate
a manual assignment, they must have at least the same level of privilege as
the person who issued the last manual assignment.
Note
The wlmassign command works with currently
loaded WLM configuration. If the current configuration is a set, and the assignment
is made to a class which does not exist in all configurations in the set,
the assignment will be lost when a configuration that does not contain the
class becomes active (class is deleted).
Flags
-g Pgid_list |
Indicates that the following list is a list of pgids. |
-S |
Specifies that the assignment is to be done or canceled at the superclass
level only. This flag is used with a subclass name of the form supername.subname. |
-s |
Specifies that the assignment is to be done or canceled at the subclass
level only. This flag is used with a subclass name of the form supername.subname. |
-u |
Cancel any manual assignment in effect for the processes in the pid_list
or the pgid_list. If none of the -s or -S flags are used, this cancels the manual assignments for both the superclass
and the subclass level. |
Related Information
The chclass command, lsclass command, mkclass command,
and rmclass command.
The concept article about Worldload Management in AIX 5L Version 5.2 System Management Concepts: Operating System and Devices.
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