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Full Discussion: fork in perl
Top Forums Shell Programming and Scripting fork in perl Post 302602419 by Anjan1 on Monday 27th of February 2012 10:24:08 AM
Old 02-27-2012
fork in perl

Hi,

I have a file which has some 50 hosts, I want to login to each host using ssh and execute any command. I am using fork function in perl. I am able to login to each host and execute the command in the hosts paralelly, but it spawing/forking 50 processes at a time.

It will consume the cpu utilization if so many processes open at a time. Can someone tell me how to limit the number of process.

For example, open 10 processes and execute the command on 10 hosts, after completion of those 10 hosts, open next 10 processes and so on.

I know that there is a perl module "Parallel::ForkManager" to limit the number of processes.
But I dont want to use it, as that module is not there in my system and I cannot install it.

Hence, I am looking how to do it using fork in perl.

Can someone help me please..
 

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cdsclerk(1m)															      cdsclerk(1m)

NAME
cdsclerk - Manages the interface between clients and the CDS server SYNOPSIS
cdsclerk [-D] [-w route] OPTIONS
For debugging use only. Causes the cdsadv clerk process not to fork. Routes serviceability messages. DESCRIPTION
The cdsclerk command manages the interface between clients and the CDS server. Privilege Required You must log in as superuser (root). NOTES
This command is used by the advertiser on the system where the CDS clerk is running. You should use this command interactively only to do diagnostic work on the host system. EXAMPLE
Before you run the following process, make sure that other clerks are not running. To start the cdsclerk process, follow these steps: Make sure that a CDS server is already running somewhere within the cell. Log in to the system as superuser (root). Log in to DCE as the machine principal of the local host. Enter the principal name in the format /hosts/hostname/self as shown in the following example command for a host named orion whose password is smith: # dce_login hosts/orion/self smith Enter the following command to see if the dced process is already running: # ps If the dced process appears on the list of active processes, proceed to step 5. If the dced process does not appear on the list of active processes, enter the following command to start the process: # dced Enter the following command to start the cdsadv process: # cdsadv Enter the following command with the appropriate arguments to start the cdsclerk process: # cdsclerk RELATED INFORMATION
Books: OSF DCE Administration Guide cdsclerk(1m)
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