Default Scheduling Classes and Priorities
The following table lists the default class and priority values used by VCS. The class and priority of trigger processes are determined by the attributes ProcessClass (default = TS) and ProcessPriority (default = ""). Both attributes can be modified according to the class and priority at which the trigger processes run.
| Process
|
Default Scheduling Class
|
Default Priority (AIX)
|
Default Priority (HP-UX)
|
Default Priority
(Linux)
|
Default Priority (Solaris)
|
Engine
|
RT
|
52
(Strongest + 2)
|
2
(Strongest + 2)
|
Min: 0
Max: 99
|
57
(Strongest - 2)
|
Process created by engine
|
TS
|
0
|
N/A
|
0
|
60 (Strongest)
|
Agent
|
TS
|
0
|
N/A
|
0
|
0
|
Script
|
TS
|
0
|
N/A
|
0
|
0
|
Note
For standard configurations, VERITAS recommends using the default values for scheduling unless specific configuration requirements dictate otherwise.
Note that the default priority value is platform-specific. When priority is set to "" (empty string), VCS converts the priority to a value specific to the platform on which the system is running. For TS, the default priority equals the strongest priority supported by the TimeSharing class. For RT, the default priority equals two less than the strongest priority supported by the RealTime class. So, if the strongest priority supported by the RealTime class is 59, the default priority for the RT class is 57. For SHR (on Solaris only), the default priority is the strongest priority support by the SHR class.
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