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Shell Programming and Scripting
Spawning multiple threads in Unix
Post 302186551 by matrixmadhan on Thursday 17th of April 2008 01:39:08 PM
04-17-2008
a better design / approach would be
( which sometimes may not be the case you are looking for )
have a controller script and it should decide the number of threads to spawn based on throttling, current load, load database that it could with stand and several other factors
also this controller script should receive success / failure message from the instance which it is spawning so that decisions could be taken based on the decision
controller script should be able to collate the results; fluctuate the number of instances running at any point of time..
this might be too much for your requirement, but if you see a pattern of running such tasks in parallel most of the time, this should be a good to go way
( which sometimes may not be the case you are looking for )
have a controller script and it should decide the number of threads to spawn based on throttling, current load, load database that it could with stand and several other factors
also this controller script should receive success / failure message from the instance which it is spawning so that decisions could be taken based on the decision
controller script should be able to collate the results; fluctuate the number of instances running at any point of time..
this might be too much for your requirement, but if you see a pattern of running such tasks in parallel most of the time, this should be a good to go way
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LEARN ABOUT HPUX
vparutil
vparutil(1M) vparutil(1M) NAME
vparutil - get and set SCSI parameters for SCSI controllers from a virtual partition SYNOPSIS
dev_path dev_path dev_path scsi_id] scsi_rate] DESCRIPTION
The command gets and sets SCSI parameters for SCSI controllers within a running virtual partition. When setting the SCSI parameters using the option, the virtual partition which owns the specified SCSI controller must be in the down state. If not, the command will fail with the appropriate error code. The SCSI parameters for a given SCSI controller must first be set (from the firmware BCH prompt or using the option) before the parameters can be retrieved using the option. The command is allowed on Itanium(R)-based platforms for compatibility. No action is taken for the command. Options recognizes the following command-line options: Deletes an entry for the specified SCSI controller at dev_path from the SCSI table. Gets the SCSI parameters for the specified SCSI controller at dev_path. Sets the SCSI parameters for the specified SCSI controller at dev_path. Operands recognizes the following command-line operands: dev_path The device path of the SCSI controller. id The SCSI ID for the specified controller (defaults to 7). rate The SCSI rate for the specified controller. This parameter can have one of two values: for the corresponding fast wide and ultra wide SCSI interfaces. Note For managing SCSI controllers, use corresponding SCSI utilities. For further information refer to SECURITY RESTRICTIONS
This command is restricted to processes owned by superuser. When virtual partition flexible administrative capability is enabled, only a Designated-Admin vPar can set SCSI parameters for SCSI con- trollers. EXAMPLES
Set the SCSI ID for controller at 0/0/2/0 to 3 with the fast wide rate: RETURN VALUE
Successful. Invalid SCSI controller specification. Invalid SCSI ID. Could not communicate with virtual partition monitor. Virtual partition which owns SCSI controller is not in down state. Internal firmware call failed. Other error. AUTHOR
was developed by the Hewlett-Packard Company. SEE ALSO
vparadmin(1M), vparboot(1M), vparcreate(1M), vparconfig(1M), vpardump(1M), vparefiutil(1M), vparenv(1M), vparextract(1M), vparmodify(1M), vparreloc(1M), vparremove(1M), vparreset(1M), vparstatus(1M), vparresources(5), vpartition(5), vpmon(5). vparutil(1M)