Sponsored Content
Top Forums Shell Programming and Scripting Keep a certain number of background processes running Post 302280631 by dgob123 on Tuesday 27th of January 2009 10:00:03 AM
Old 01-27-2009
Keep a certain number of background processes running

I've got a bit of code I'm trying to work on...
What i want to happen is ... at all times have four parallel mysql dump and imports running.

I found the follow code snippet on the forum and modified it to work
by starting four concurrent processes but it waits until all four are done before starting the next four...

Code:
 
LIST='wmi_product wmi_patches employee actions jobs appversions os hardware detection_apps status wmi_networkadapterconfig wmi_logicaldisk'
let counter=0;
for i in $LIST
do
   echo "    Dumping and Importing table $i" " ( `date +'%x %X'` ) "
   $MYSQLDUMP -h$DBHOST -u$USER -p$PASSWORD -q --opt --single-transaction --add-drop-table $DB --tables $i | $MYSQL -u$DBuser -p$DBpass $DB > $ilog.txt &
    let counter=$counter+1
    echo "$counter%4" | bc
    if [ `echo "$counter%4" | bc` -eq 0 ] ; then
          wait
    fi
done;

Is there a way to do this?
Any help would be appreciated.
 

10 More Discussions You Might Find Interesting

1. Shell Programming and Scripting

Running two processes in background

hi there, here's what i need in my korn-shell: ... begin korn-shell script ... nohup process_A.ksh ; nohup process_B.ksh & ... "other stuff" ... end lorn-shell script in plain english i want process A and process B to run in the background so that the script can continue doing... (6 Replies)
Discussion started by: jacob_gs
6 Replies

2. Shell Programming and Scripting

Determine Number of Processes Running

I am pretty new to unix, and I have a project to do. Part of the project asks me to determine the number of processes running and assign it to a variable. I know how to every part of the project but determine the number of processes running. How can I get just the number of processes... (4 Replies)
Discussion started by: wayne1411
4 Replies

3. Solaris

About running processes in background

Hi, I need to establish a procedure that will start an application in background each time my remote Solaris server is (re)started. This would be a kind of daemon. I am no sysadmin expert, so I am looking for pointers. How should I proceed? What are the main steps? Thanks, JVerstry (9 Replies)
Discussion started by: JVerstry
9 Replies

4. Shell Programming and Scripting

Waiting for an arbitrary background process (limiting number of jobs running)

Hi, I'm trying to write a script to decompress a directory full of files. The decompression commands can run in the background, so that many can run at once. But I want to limit the number running at any one time, so that I don't overload the machine. Something like this: n=0 for i in *.gz... (15 Replies)
Discussion started by: p.f.moore
15 Replies

5. Shell Programming and Scripting

Background Processes

Ok guys so I have my first dummy shell almost done except for one tiny part: I do not know how to run a process in the background, from the code! I already know how to do that in a normal shell: $ program & However, no clue when it comes to how to program that thing. :eek: A very... (2 Replies)
Discussion started by: Across
2 Replies

6. Shell Programming and Scripting

How to Control Number of Processes Running

Hi Is there a way to count how many processes a script has started, count how many of these have finished, and make the script wait if their difference goes over a given threshold? I am using a script to repeatedly execute a code (~100x) which converts 2 data files into one .plt which is in... (4 Replies)
Discussion started by: drbones
4 Replies

7. UNIX for Dummies Questions & Answers

Query on Running Multiple processes in background

HI All , Pardon me for asking some very basic questions, I would be grateful if someone can help. I am trying to execute a shell script which runs multiple processes in background. It includes various operations like copying , DB operations etc etc. Now problem is that the complete script... (6 Replies)
Discussion started by: gpta_varun
6 Replies

8. UNIX for Dummies Questions & Answers

How do you print the number of processes that each user is currently running in Unix?

Ok, so I know there's a way to do this, but I've been trying to find out all afternoon with no luck. I think it should print out something like this: 1 bin 2 daemon 6 duo Where the numbers on the left are the number of processes being run by the user whose name is listed on the right. Is... (4 Replies)
Discussion started by: Duo11
4 Replies

9. Shell Programming and Scripting

Need help on background processes

Hi, I have a schell script parent.ksh from which I am calling three background processes a.ksh,b.ksh and c.ksh. Once these three processes completes the next step in parent.ksh should execute. How to achieve this? Please help me.... Thanks... (1 Reply)
Discussion started by: ravinunna
1 Replies

10. UNIX for Dummies Questions & Answers

How do I find the number of processes running on root?

Is there a certain man command I'm missing here? I searched in ps but I couldn't find something that would give me the number of processes running on root. I only want to see the number of processes, not the processes itself. (2 Replies)
Discussion started by: l3monz
2 Replies
ATF-SH(1)						    BSD General Commands Manual 						 ATF-SH(1)

NAME
atf-sh [-s shell] -- interpreter for shell-based test programs SYNOPSIS
atf-sh script DESCRIPTION
atf-sh is an interpreter that runs the test program given in script after loading the atf-sh(3) library. atf-sh is not a real interpreter though: it is just a wrapper around the system-wide shell defined by ATF_SHELL. atf-sh executes the inter- preter, loads the atf-sh(3) library and then runs the script. You must consider atf-sh to be a POSIX shell by default and thus should not use any non-standard extensions. The following options are available: -s shell Specifies the shell to use instead of the value provided by ATF_SHELL. ENVIRONMENT
ATF_LIBEXECDIR Overrides the builtin directory where atf-sh is located. Should not be overridden other than for testing purposes. ATF_PKGDATADIR Overrides the builtin directory where libatf-sh.subr is located. Should not be overridden other than for testing purposes. ATF_SHELL Path to the system shell to be used in the generated scripts. Scripts must not rely on this variable being set to select a specific interpreter. EXAMPLES
Scripts using atf-sh(3) should start with: #! /usr/bin/env atf-sh Alternatively, if you want to explicitly choose a shell interpreter, you cannot rely on env(1) to find atf-sh. Instead, you have to hardcode the path to atf-sh in the script and then use the -s option afterwards as a single parameter: #! /path/to/bin/atf-sh -s/bin/bash ENVIRONMENT
ATF_SHELL Path to the system shell to be used in the generated scripts. SEE ALSO
atf-sh(3) BSD
September 27, 2014 BSD
All times are GMT -4. The time now is 08:02 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy