Cannot run a job on multiple nodes

[roentgenium]

I’m trying to run a job (quantum chemistry, ORCA) on my cluster with 1 management node and 4 calculation nodes.
I read through the following very informative topic.

Job not getting distributed among nodes

I am testing pbs. Currently the setup is 1 head node and 2 Nodes Centos 7 PBS 20.0.1 In the PBS script when I give parameter - #PBS -l nodes=2:ppn=1 I am assuming it means 1 process on both nodes. After submitting job also when I run tracejob it shows properly - Job Run at request of Scheduler@pb0 on exec_vnode (pb1:ncpus=1:mem=524288kb)+(pb2:ncpus=1:mem=524288kb) But in reality, it only runs on one node. What could be the issue? In $PBS_HOME/sched_priv/sched_config I have kept - loa…

And, I successfully ran the stress script.

#PBS -q large
#PBS -l select=2:ncpus=16:mpiprocs=16
#PBS -l place=scatter

cd $PBS_O_WORKDIR
total_cores=`cat $PBS_NODEFILE | wc -l `
echo "total_cores=$total_cores"
total_hosts=`cat $PBS_NODEFILE | uniq | wc -l`
echo "total_hosts=$total_hosts"
cores_per_host=$((total_cores / total_hosts))
echo "cores_per_host=$cores_per_host"
echo "running stress"
echo "/usr/local/bin/pbsdsh -- stress --cpu $cores_per_host  --timeout 60s"
/usr/local/bin/pbsdsh -- stress --cpu $cores_per_host  --timeout 60s
echo "ending stress"

Here is the output. It looks fine.

total_cores=32
total_hosts=2
cores_per_host=16
running stress
/opt/pbs/bin/pbsdsh -- stress --cpu 16  --timeout 100s
stress: info: [12621] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12622] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12626] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12640] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12656] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12671] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12688] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12704] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12719] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12734] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12750] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12769] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12779] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12827] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151607] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151608] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12844] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151609] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12777] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151623] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151644] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151660] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151677] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151694] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151711] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151745] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151724] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151762] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151795] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151812] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151829] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [151846] dispatching hogs: 16 cpu, 0 io, 0 vm, 0 hdd
stress: info: [12640] successful run completed in 60s
stress: info: [12656] successful run completed in 60s
stress: info: [12704] successful run completed in 60s
stress: info: [12622] successful run completed in 60s
stress: info: [12671] successful run completed in 60s
stress: info: [12621] successful run completed in 60s
stress: info: [12688] successful run completed in 60s
stress: info: [12719] successful run completed in 60s
stress: info: [12626] successful run completed in 60s
stress: info: [12734] successful run completed in 60s
stress: info: [12779] successful run completed in 60s
stress: info: [12827] successful run completed in 60s
stress: info: [151608] successful run completed in 60s
stress: info: [151677] successful run completed in 60s
stress: info: [151694] successful run completed in 60s
stress: info: [151607] successful run completed in 60s
stress: info: [151623] successful run completed in 60s
stress: info: [151609] successful run completed in 60s
stress: info: [151644] successful run completed in 60s
stress: info: [151660] successful run completed in 60s
stress: info: [12844] successful run completed in 60s
stress: info: [12777] successful run completed in 60s
stress: info: [12750] successful run completed in 60s
stress: info: [12769] successful run completed in 60s
stress: info: [151711] successful run completed in 60s
stress: info: [151745] successful run completed in 60s
stress: info: [151724] successful run completed in 60s
stress: info: [151762] successful run completed in 60s
stress: info: [151795] successful run completed in 60s
stress: info: [151812] successful run completed in 60s
stress: info: [151829] successful run completed in 60s
stress: info: [151846] successful run completed in 60s
ending stress

Next, I tried to run a ORCA job with this input file and also successfully ran the job.

#!/bin/sh
#PBS -q small
#PBS -l select=1:ncpus=16:mpiprocs=16

# Start ORCA Settings
ORCA=/path/to/orca

PATH=$ORCA:$PATH
LD_LIBRARY_PATH=$ORCA:$LD_LIBRARY_PATH

export PATH LD_LIBRARY_PATH
# End ORCA Settings

DIRNAME=`basename $PBS_O_WORKDIR`
WORKDIR=/tmp/$USER/$PBS_JOBID
mkdir -p $WORKDIR
cp -raf $PBS_O_WORKDIR $WORKDIR
cd $WORKDIR/$DIRNAME

export JOBNAME=job

/path/to/orca/orca $JOBNAME.inp > $JOBNAME.out

cd
if cp -raf $WORKDIR/$DIRNAME $PBS_O_WORKDIR/.. ; then
   rm -rf $WORKDIR
fi

Then, I tried to run a ORCA job with multiple nodes like below.

#!/bin/sh
#PBS -q large
#PBS -l select=2:ncpus=16:mpiprocs=16
#PBS -l place=scatter

# Start ORCA Settings
ORCA=/path/to/orca

PATH=$ORCA:$PATH
LD_LIBRARY_PATH=$ORCA:$LD_LIBRARY_PATH

export PATH LD_LIBRARY_PATH
# End ORCA Settings

DIRNAME=`basename $PBS_O_WORKDIR`
WORKDIR=/tmp/$USER/$PBS_JOBID
mkdir -p $WORKDIR
cp -raf $PBS_O_WORKDIR $WORKDIR
cd $WORKDIR/$DIRNAME

export JOBNAME=FePc

/path/to/orca/orca $JOBNAME.inp "--oversubscribe" > $JOBNAME.out

cd
if cp -raf $WORKDIR/$DIRNAME $PBS_O_WORKDIR/.. ; then
   rm -rf $WORKDIR
fi

During the run.

Job Id: 2095.peach
    Job_Name = job.sh
    resources_used.cpupercent = 1582
    resources_used.cput = 02:39:14
    resources_used.mem = 21201068kb
    resources_used.ncpus = 32
    resources_used.vmem = 47555576kb
    resources_used.walltime = 00:09:59
    job_state = R
    queue = large
    server = peach
    Checkpoint = u
    ctime = Thu Mar 14 10:56:01 2024
    exec_host = peach02/0*16+peach01/0*16
    exec_vnode = (peach02:ncpus=16)+(peach01:ncpus=16)
    Hold_Types = n
    Join_Path = n
    Keep_Files = n
    Mail_Points = a
    mtime = Thu Mar 14 11:06:03 2024
    Priority = 0
    qtime = Thu Mar 14 10:56:01 2024
    Rerunable = True
    Resource_List.mpiprocs = 32
    Resource_List.ncpus = 32
    Resource_List.nodect = 2
    Resource_List.nodes = 4
    Resource_List.place = scatter
    Resource_List.select = 2:ncpus=16:mpiprocs=16
    stime = Thu Mar 14 10:56:01 2024
    session_id = 12898
    substate = 42
    Variable_List = PBS_O_HOME=/home/user,PBS_O_LANG=ja_JP.UTF-8,
        PBS_O_LOGNAME=user,
        PBS_O_PATH=/home/user/bin:/home/user/bin/orca:/usr/local/bin:/us
        r/bin:/bin:/usr/local/games:/usr/games:/usr/local/bin,
        PBS_O_SHELL=/bin/bash,PBS_O_WORKDIR=/home/user/orca/test/FePc2,
        PBS_O_SYSTEM=Linux,PBS_O_QUEUE=large,
    comment = Job run at Thu Mar 14 at 01:56 on (peach02:ncpus=16)+(peach01:ncp
        us=16)
    etime = Thu Mar 14 10:56:01 2024
    run_count = 1
    Submit_arguments = job.sh
    project = _pbs_project_default

However, it looks 32 processes run on peach02 and it was not distributed to peach01.

This may ORCA specific issue, but I do appreciate your help.

[adarsh]

@roentgenium

This may ORCA specific issue, but I do appreciate your help.

The ORCA needs to use MPI libraries to disbribute work across multiple nodes.

• Intel MPI
• Open MPI
• Platfrom/HP MPI

Request to please check with ORCA team whether

1. multi-core jobs on a single host
2. multi-node multi-core jobs are supported

Some references:

ORCA Input Library - Setting up ORCA

https://www.orcasoftware.de/tutorials_orca/first_steps/parallel.html
https://hpc-uit.readthedocs.io/en/latest/applications/chemistry/ORCA/ORCA.html

Please note : if you choose OpenMPI, OpenMPI needs to be compiled with PBS TM library for tight integration. You can find this discussed in this forum.

[roentgenium]

Thank adarsh,

• multi-core jobs on a single host
• multi-node multi-core jobs are supported

Both look supported.
I can run a ORCA job with multi-cores on another single host with OpenMPI 4.1.4 installed from Debian repository.
Based on the reference you suggested, it looks one can run it on multi-node.

I complied the latest OpenPBS 23.06.06 on the calculation nodes (sharing directories via NFS).
If I understand it correctly, it automatically recognizes OpenPBS in the “./configure” process, but not sure.

I tried to use OpenMPI 4.1.4 installed from Debian repository and self-compiled OpenMPI 4.1.1, but cannot run a job on multi-nodes with multi-cores.

I look into the references you suggested. Thank you again!