We have written a bare bones scheduling app using bash scripts. The input to the scheduler is from a mainframe scheduling tool, and the scripts exit code is returned to the MF. The problem is that every now and again I have a script that does not complete and this is left in my Q. I am in the process of writing a clean up script that would run every now and again to find these rogue scripts and clean them out of my running Q. When executing the script I store the PID. The heart of my cleanup script is to determine if the PID is still active.
I have tried various methods to determine this including ps -p $id and kill -0 $id, but none seems to give me the result I require. I understand that the kill option might not work if I am not the process owner and I have read all the documentation on the ps command, but I can not find an answer to my question.
My script looks like this currently:
Last edited by Scott; 02-06-2014 at 10:46 AM..
Reason: Please use code tags
Hi
Does anybody know the steps and requirements of the installation process of Windows Active Directory using Unix/Linux Bind DNS.
I will appreciate if somebody gives the answer. (1 Reply)
Hello - I have a very vague question, which will probably result in vague answers because I don't have a lot of detailed information and I don't know a whole lot about active directory.
Our Windows/NT admin has been rolling out Active Directory over the past several weeks and as time goes on,... (1 Reply)
Hi all,
If Windows server have an active directory and active folder/mapping(maybe in unix NFS).
Is there any similiar fuctions in unix. Actually if we have a hundred client in unix/linux with unix server, I want to manage user client and access control easier as in windows.
Thank you in... (5 Replies)
hi
i'm running a shell script that checks the amount of cpu idle either using /usr/bin/vmstat 1 2 or sar 1 2 (on unixware) before i run some tests(if cpu idle greater than 89 I run them).
These tests are run on many platforms, linux(suse, redhat) hp-ux, unixware, aix, solaris, tru64.
... (5 Replies)
Hi All,
I have to find out how many active connections with other machines are there,then list the remote machine IP address and type of connection.
When u say type of connection what does it means TCP,UDP ram. then what is UNIX active connection
Please let me know as soon as possible.
... (3 Replies)
Hey guys.
Maybe this should go in Security, I'm not sure...
At my work we make websites. Our development servers for these websites are run on a central Debian linux server which we can SSH into, which also contains all the files for these websites. These files are served to the entire... (1 Reply)
I have some Solaris processes that run weeks at a time that create rather large log files that I would like to archive/compress daily. Instead of stopping the process, what can be done so that the log file is backed up and shrunk, but the process can still log to the open file handle without major... (7 Replies)
Stupid question, but is there an ANSI C stdlib function that will do this for me? I want to pass the function a path and determine if the current process can read/write/execute on the path. I suppose I can whip something up using fstat and then determining the current process's user/group IDs and... (6 Replies)
Is it possible to display active processes' Year,Month,Day,Hour,Minute,Second info of process start time ? Preferbly in the format "YYYY/MM/DD HH:MM:SS" ?
I tried to do this with the ps command but it only gets the time or date.
Any help will be greatly appreciated.
Cheers
Steve (4 Replies)
At the moment we are integrating LDAP in our environment.
Compared to Windows this process is much complicated and time consuming.
With Windows you had Active Directory and if you create a new server, you just add it to the domain and your finished.
Yes, I know Unix is not Windows.
Are there... (1 Reply)
Discussion started by: misterx12345
1 Replies
LEARN ABOUT CENTOS
ionice
IONICE(1) User Commands IONICE(1)NAME
ionice - set or get process I/O scheduling class and priority
SYNOPSIS
ionice [-c class] [-n level] [-t] -p PID...
ionice [-c class] [-n level] [-t] command [argument...]
DESCRIPTION
This program sets or gets the I/O scheduling class and priority for a program. If no arguments or just -p is given, ionice will query the
current I/O scheduling class and priority for that process.
When command is given, ionice will run this command with the given arguments. If no class is specified, then command will be executed with
the "best-effort" scheduling class. The default priority level is 4.
As of this writing, a process can be in one of three scheduling classes:
Idle A program running with idle I/O priority will only get disk time when no other program has asked for disk I/O for a defined grace
period. The impact of an idle I/O process on normal system activity should be zero. This scheduling class does not take a priority
argument. Presently, this scheduling class is permitted for an ordinary user (since kernel 2.6.25).
Best-effort
This is the effective scheduling class for any process that has not asked for a specific I/O priority. This class takes a priority
argument from 0-7, with a lower number being higher priority. Programs running at the same best-effort priority are served in a
round-robin fashion.
Note that before kernel 2.6.26 a process that has not asked for an I/O priority formally uses "none" as scheduling class, but the
I/O scheduler will treat such processes as if it were in the best-effort class. The priority within the best-effort class will be
dynamically derived from the CPU nice level of the process: io_priority = (cpu_nice + 20) / 5.
For kernels after 2.6.26 with the CFQ I/O scheduler, a process that has not asked for an I/O priority inherits its CPU scheduling
class. The I/O priority is derived from the CPU nice level of the process (same as before kernel 2.6.26).
Realtime
The RT scheduling class is given first access to the disk, regardless of what else is going on in the system. Thus the RT class
needs to be used with some care, as it can starve other processes. As with the best-effort class, 8 priority levels are defined
denoting how big a time slice a given process will receive on each scheduling window. This scheduling class is not permitted for an
ordinary (i.e., non-root) user.
OPTIONS -c, --class class
Specify the name or number of the scheduling class to use; 0 for none, 1 for realtime, 2 for best-effort, 3 for idle.
-n, --classdata level
Specify the scheduling class data. This only has an effect if the class accepts an argument. For realtime and best-effort, 0-7 are
valid data (priority levels).
-p, --pid PID...
Specify the process IDs of running processes for which to get or set the scheduling parameters.
-t, --ignore
Ignore failure to set the requested priority. If command was specified, run it even in case it was not possible to set the desired
scheduling priority, which can happen due to insufficient privileges or an old kernel version.
-h, --help
Display help and exit.
-V, --version
Display version information and exit.
EXAMPLES
# ionice -c 3 -p 89
Sets process with PID 89 as an idle I/O process.
# ionice -c 2 -n 0 bash
Runs 'bash' as a best-effort program with highest priority.
# ionice -p 89 91
Prints the class and priority of the processes with PID 89 and 91.
NOTES
Linux supports I/O scheduling priorities and classes since 2.6.13 with the CFQ I/O scheduler.
AUTHORS
Jens Axboe <jens@axboe.dk>
Karel Zak <kzak@redhat.com>
AVAILABILITY
The ionice command is part of the util-linux package and is available from ftp://ftp.kernel.org/pub/linux/utils/util-linux/.
util-linux July 2011 IONICE(1)