Grid Engine Commands

QSTAT Command

• To check the status of the jobs we use the qstat command

qstat

# to get information about specific job
qstat -j <job-id>

# to get the full information of the resources
qstat -f 

# to get the full details of all the jobs running
qstat -F

# To get the filter for a queue we use
qstat -q queue_list

# to filter by queue state 
qstat -qs {a|c|d|o|s|u|A|C|D|E|S}

# to filter jobs by users
qstat -u <userid>

# to show all user's job
qstat -u \*

QSUB

• To submit a batch job we use the qsub command

# Example 1: to submit a simple bash job
qsub <script_path>

# Example 2: To submit an advanced batch job we use
qsub -cwd -S /bin/bash -i /data/example.in -o /results/example.out -j y example.sh arg1 arg2
# Options explained:
# -cwd: job will be executed from the same directory
# -S: bash shell will be assigned to interpret the submitted job
# -i: this file will be used as an input
# -o: this file will be used to show output
# -j y: this will merge the error into the same as the output file

# Example 3: advanced script
qsub -N example3 -P project_test -p -28 -l a=lx-amd64 example.sh
# Options explained:
# -N: this will be submitted by the given name, instead of the script name
# -P: this job will be submitted to project_test
# -p: this will assign lower priority to the given job than normal priority
# -l: this will request for amd64 resource on the scheduler

# Example 4: to submit a binary job
qsub -b y firefox

Job Submission Script

#!/bin/bash

#$ -N example3
#$ -P "project-name"
#$ -o test.out -e error.err
#$ -l mem=6G
#$ -l cpu=2

# command to be executed
echo "just a test"

QDEL

• qdel is used to delete a job in the queue

# Force delete a job in the queue
qdel -f <job-id>

# to delete specific tasks of a job
qdel <job-id> -t <task-range>

# to delete all the jobs from a specific user, only possible for managers
qdel -u <user-list> "*"

How to check for the list of the nodes

• To check the list of the current nodes we use the qhost command

qhost

# To check the jobs running under the specific hosts we use
qhost -q -j

Comments

[Jimmy McBride]

What is grid engine and all these qcommands for? is it a hosting platform or something like that? Along the lines of teraform or something similar?

[Linux_guy]

hey jimmy, well grid engine is scheduler, which runs upon Linux clusters, it is used to distribute process over multiple nodes.

it's a part of HPC : High performance Computing

as I'm working as a Cloud HPC Engineer, so I thought it's worth sharing this knowledge with you guys.

Thanks for showing interest though 😊😊😊

[Jimmy McBride]

Very nice! Thanks for sharing :)