Deep Learning Example

$ ssh -l <username> hpc7.ncg.ingrid.pt
[username@hpc7 ~]$ _

Prepare a python virtual environment

The default python version for CentOS 7.x is 2.7.5 which is not suitable for our example that rely on version 3.6 and up. So, we will create a python virtual environment with our example needed components:

[username@hpc7 ~]$ scl enable rh-python36 bash
[username@hpc7 ~]$ python -m venv ~/pvenv
[username@hpc7 ~]$ source ~/pvenv/bin/activate
[username@hpc7 ~]$ pip install --upgrade pip
[username@hpc7 ~]$ pip install --upgrade setuptools
[username@hpc7 ~]$ pip install tensorflow-gpu
[username@hpc7 ~]$ pip install keras

This opperation is performed only once, the python virtual environment will be reused all over your jobs.

Submit a Job to install TensorFlow and Keras on the python virtual envionment

Since we do not have direct access to the GPU on the submit node then we have to submit one job, and only one, to install TensorFlow and Keras on our python virtual environment.

Create a submit script like as showed bellow and submit it:

[username@hpc7 ~]$ vi pip_install.sh
#!/bin/bash
#$ -q tesla
scl enable rh-python36 bash
source ~/pvenv/bin/activate
pip install tensorflow-gpu
pip install keras

[username@hpc7 ~]$ qsub pip_install.sh

Check the job output files after finished for correct completion, if something is wrong try to solve the problem or request support from helpdesk@incd.pt. You can also include in the job the full python virtual environment preparation as showed on the previous section if you like.

Check the python virtual environment

You may check if the python virtual environment is working as expected, for example:

[username@hpc7 ~]$ python --version
Python 2.7.5
[username@hpc7 ~]$ scl enable rh-python36 bash
[username@hpc7 ~]$ python --version
Python 3.6.9
[username@hpc7 ~]$ source ~/pvenv/bin/activate
[username@hpc7 ~]$ pip list
Package              Version   
-------------------- ----------
...
Keras                2.3.1
Keras-Applications   1.0.8
Keras-Preprocessing  1.1.0
...
setuptools           44.0.0
...
tensorboard          2.0.2     
tensorflow-estimator 2.0.1     
tensorflow-gpu       2.0.0

Prepare your code

Choose a working directory for your code, for the purpose of this example we will run a deep learning python script named run.py, create also a submit script:

[username@hpc7 ~]$ mkdir dp
[username@hpc7 ~]$ cd dp
[username@hpc7 ~]$ wget https://wiki.incd.pt/attachments/70

[username@hpc7 ~]$ vi dl.sh
#!/bin/bash
#$ -q tesla
scl enable rh-python36 bash
source ~/pvenv/bin/activate
module load cuda-10.2
python run.py

[username@hpc7 ~]$ ls -l
-rwxr-----+ 1 username hpc  514 Jan  5 13:42 dl.sh
-rw-r-----+ 1 username hpc 1378 Jan  5 15:42 run.py