# OpenPBS is not able to use all given nodes

**URL:** <https://community.openpbs.org/t/openpbs-is-not-able-to-use-all-given-nodes/2701>\
**Category:** Users/Site Administrators\
**Created:** [July 19, 2021, 9:26am UTC](https://community.openpbs.org/t/openpbs-is-not-able-to-use-all-given-nodes/2701 "2021-07-19T09:26:27Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![rms1975](https://avatars.discourse-cdn.com/v4/letter/r/b5e925/32.png) [@rms1975](https://community.openpbs.org/u/rms1975)\
**Post date:** [July 19, 2021, 9:26am UTC](https://community.openpbs.org/t/openpbs-is-not-able-to-use-all-given-nodes/2701/1 "2021-07-19T09:26:27Z")

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I have recently installed OpenPBS-20.0.1. Installation was successfull and able to submit jobs also.  
Using 04 compute nodes each is having 64 cores. But if I give below statement to reserve resource it is consuming all resources on one node only and not able to distribute on all 04 nodes.

`#PBS -l select=4:ncpus=16:mpiprocs=16`

If use all 64 cores per node then only it is able distribute job on all nodes.

`#PBS -l select=4:ncpus=64:mpiprocs=64`

Is there any bug in this version, Using OS RHEL-8.2 on all nodes.

Thanks.

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**Author:** ![dtalcott](https://yyz2.discourse-cdn.com/flex030/user_avatar/community.openpbs.org/dtalcott/32/410_2.png) [@dtalcott](https://community.openpbs.org/u/dtalcott)\
**Post date:** [July 19, 2021, 4:27pm UTC](https://community.openpbs.org/t/openpbs-is-not-able-to-use-all-given-nodes/2701/2 "2021-07-19T16:27:29Z")

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Check the documentation for the “place” option. You probably want to add “place=scatter” to your qsub options.

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**Author:** ![adarsh](https://avatars.discourse-cdn.com/v4/letter/a/f07891/32.png) [@adarsh](https://community.openpbs.org/u/adarsh)\
**Post date:** [July 20, 2021, 1:29pm UTC](https://community.openpbs.org/t/openpbs-is-not-able-to-use-all-given-nodes/2701/3 "2021-07-20T13:29:47Z")

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> [@rms1975](#):
>
> +1 @dtalcott
> 
> `#PBS -l select=4:ncpus=16:mpiprocs=16`

Add the place line as below :  
#PBS -l select=4:ncpus=16:mpiprocs=16  
**#PBS -l place=scatter**

#PBS -l select=4:ncpus=64:mpiprocs=64  
#PBS -l place=scatter