Re: [HTCondor-users] about pid_max

["jiangxw@xxxxxxxxxxxxxxx" <jiangxw@xxxxxxxxxxxxxxx>]

Dear Greg,

    Thanks for reply.

    I have another quetion about pid_max.

    Is the number of our running jobs proportional to pid_max?

    If I want to running 20000 jobs, is it enough that the pid_max set to 65535?

    And the schedd will probably running amount of shadows, it needs higher pid_max,

    is startd needs higher pid_max?

Cheers,

Jiang xiaowei,

---

NAMEïJiang Xiaowei

MAILïjiangxw@xxxxxxxxxxxxxxx

TELï010 8823 6024

DEPARTMENTïComputing Center of IHEP

 

From: Greg Thain

Date: 2016-11-30 22:39

To: htcondor-users

Subject: Re: [HTCondor-users] about pid_max

On 11/30/2016 03:06 AM, jiangxw@xxxxxxxxxxxxxxx wrote:

Dear all,

    /proc/sys/kernel/pid_max will be changed to 4194303 when condor start.

    The defalt value is 32768.

    How can I prevent it happens? Are there some configurations limiting that?

    Wish for replys.

This is done in /usr/libexec/condor/linux_kernel_tuning

Condor does this, so there is no limit on the number of jobs it can run.  You can comment out the line in the script if you don't need to run more than 10,000 jobs concurrently.

-greg