Do you mean to say executing each set of three simultaneously ? ( background) and wait for them to finish before executing next three?
if not so, they are anyway will be executed one by one. no matters set of three!!!
I wrote a server which creates a thread for every client connection. I have to include timeout function that will kill the server thread if the client doesn't respond for specific time. That too using signal(SIGALRM). For this i am using alarm() function.
When the server thread detects signal it... (1 Reply)
Hi
i m codding a programm,it can download any packet from ftp,I use libcurl library. But i want to use threads for downloading.(Multithreading).i cant get ftp file size from ftp and divide packet small pieces,like threads use.
Please share your experince with me ,thanks. (0 Replies)
Hello,
I'm coding an application using pthreads.At some point the threads will read some read-only variables.Is it safe NOT to use mutexes, in order to make the program lighter since mutex operations are resource-demanding...
Thanks (1 Reply)
Hi all,i'm new on this forum, excuse me for my english.
I have wrote a server that accept connection from multiple client with the fork,but every client had to insert data in a linear list.
The problem is that every client insert data in an own copy of the linear list and this is caused by... (7 Replies)
hi,
i have a script that runs on bash and would like to run it on a machine that has csh and bash. the default setting on that machine is csh. i dont want to change my code to run it with a csh shell. is there any way i can run the script (written in bash) on this machine? in other words is there... (3 Replies)
Dear Friends,
We have one T5240 server with 128vcpus in our lab.Performance of the server is very poor. Application uses only 2% of processor..I heard that single thread application performs slowly in coolthread.How can we find whether the application running on multithread or single thread? If... (7 Replies)
I am currently have Centos 5.5 which consumes more CPU waiting for Kcrypt process. Later came to know that kcrypt is single threaded and hence consumes one CPU, results in performance degradation.
Does any one really knows/practically experimented multithread of Kcryptd process with any of... (1 Reply)
In shell scripting, TestEmail is an existing group email. I am using the below command to send emails who are existed under TestEmail . Unable to receive the email. I have tried group ="id1 id2 " .Its working and i tried creating alias as well.
Can we do it without creating alias or group ="id1... (1 Reply)
I'm new to utilities like socat and netcat and I'm not clear if they will do what I need.
I have a "compileDeployStartWebServer.sh" script and a "StartBrowser.sh" script that are started by emacs/elisp at the same time in two different processes.
I'm using Cygwin bash on Windows 10.
My... (3 Replies)
Discussion started by: siegfried
3 Replies
LEARN ABOUT OPENDARWIN
queuedefs
queuedefs(4) File Formats queuedefs(4)NAME
queuedefs - queue description file for at, batch, and cron
SYNOPSIS
/etc/cron.d/queuedefs
DESCRIPTION
The queuedefs file describes the characteristics of the queues managed by cron(1M). Each non-comment line in this file describes one queue.
The format of the lines are as follows:
q.[njobj][nicen][nwaitw]
The fields in this line are:
q The name of the queue. a is the default queue for jobs started by at(1); b is the default queue for jobs started by batch (see
at(1)); c is the default queue for jobs run from a crontab(1) file.
njob The maximum number of jobs that can be run simultaneously in that queue; if more than njob jobs are ready to run, only the first
njob jobs will be run, and the others will be run as jobs that are currently running terminate. The default value is 100.
nice The nice(1) value to give to all jobs in that queue that are not run with a user ID of super-user. The default value is 2.
nwait The number of seconds to wait before rescheduling a job that was deferred because more than njob jobs were running in that job's
queue, or because the system-wide limit of jobs executing has been reached. The default value is 60.
Lines beginning with # are comments, and are ignored.
EXAMPLES
Example 1: A sample file.
#
#
a.4j1n
b.2j2n90w
This file specifies that the a queue, for at jobs, can have up to 4 jobs running simultaneously; those jobs will be run with a nice value
of 1. As no nwait value was given, if a job cannot be run because too many other jobs are running cron will wait 60 seconds before trying
again to run it.
The b queue, for batch(1) jobs, can have up to 2 jobs running simultaneously; those jobs will be run with a nice(1) value of 2. If a job
cannot be run because too many other jobs are running, cron(1M) will wait 90 seconds before trying again to run it. All other queues can
have up to 100 jobs running simultaneously; they will be run with a nice value of 2, and if a job cannot be run because too many other jobs
are running cron will wait 60 seconds before trying again to run it.
FILES
/etc/cron.d/queuedefs queue description file for at, batch, and cron.
SEE ALSO at(1), crontab(1), nice(1), cron(1M)SunOS 5.10 1 Mar 1994 queuedefs(4)