7. Configuring the Eight Nodes | Build Supercomputers with Raspberry Pi 3

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Build Supercomputers with Raspberry Pi 3

By : Carlos R. Morrison

4.3 (7)

Build Supercomputers with Raspberry Pi 3

4.3 (7)

By: Carlos R. Morrison

Overview of this book

Author Carlos R. Morrison (Staff Scientist, NASA) will empower the uninitiated reader to quickly assemble and operate a Pi3 supercomputer in the shortest possible time. The lifeblood of a supercomputer, the MPI code, is introduced early, and sample MPI code provides additional practice opportunities for you to test the effectiveness of your creation. You will learn how to configure various nodes and switches so that they can effectively communicate with each other. By the end of this book, you will have successfully built a supercomputer and the various applications related to it.

Preface

Preface

What this book covers

What you need for this book

Who this book is for

Conventions

Reader feedback

Customer support

Free Chapter

1. Getting Started with Supercomputing

1. Getting Started with Supercomputing

Von Neumann architecture

Flynn's classical taxonomy

Historical perspective

The need for greater processing speed

Additional analytical perspective

Sources for reference

Summary

2. One Node Supercomputing

2. One Node Supercomputing

Linux installation

PC processor

Accessing processor technical details

Write/run serial π code

Message passing interface

Summary

3. Preparing the Initial Two Nodes

3. Preparing the Initial Two Nodes

Listing of parts

The Pi2/Pi3 computer

Project overview

Super stack assembly

Preparing the master node

Transferring the code

Preparing the slave node

Summary

4. Static IP Address and Hosts File Setup

4. Static IP Address and Hosts File Setup

Configuring static IP address of the master Pi

Configuring a network switch static IP address

Hosts file setup

Summary

5. Creating a Common User for All Nodes

5. Creating a Common User for All Nodes

Adding a new user for all nodes

ID key generation

ID key transfer

Summary

6. Creating a Mountable Drive on the Master Node

6. Creating a Mountable Drive on the Master Node

Summary

7. Configuring the Eight Nodes

7. Configuring the Eight Nodes

Automating mounting of drives

Setting up the host file for all nodes

Formatting the remaining slave SD cards

Copying the slave1 SD card image to the main computer drive

Copying the slave1 image to the remaining slave SD cards

Summary

8. Testing the Super Cluster

8. Testing the Super Cluster

Wielding the -H command

Pi2 supercomputing

Pi3 supercomputing

Creating bash files

Using unrestrained MPI code logic

Summary

9. Real-World Math Application

9. Real-World Math Application

MPI Taylor series sine(x) function

MPI Taylor series cosine(x) function

MPI Taylor series tan(x) function

MPI Taylor series ln(x) function

Summary

10. Real-World Physics Application

10. Real-World Physics Application

MPI concurrent wave equation and code

Summary

11. Real-World Engineering Application

11. Real-World Engineering Application

MPI Fourier series sawtooth signal

Summary

A. Appendix

A. Appendix

Definitions

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Setting up the host file for all nodes

Now that the first slave (Slv1) node is set up, you need to update the hosts file on both the master (Mst0) and slave (Slv1) nodes to reflect all the remaining six or sixteen nodes in the super cluster. First, you will copy (using win32 Disk Imager) the image of the Slv1 SD card to your desktop. This image file will then be copied to the other six or fourteen slave SD cards, and then return them to the slave Pis. Finally, you will make additional minor modifications to the data on each card.

So, let's now edit again the hosts file on the master node. Enter exit to return to the pi@Mst0:~$ prompt, and then enter sudo vim/etc/hosts. Add the rest of the IP addresses and host names. Repeat this procedure for the slave (Slv1) node (see highlighted text in the following screenshot):

Do the same for the master node, (see the following screenshot):

Note that those six additional records are place holders as the IP addresses for the remaining six slave nodes...

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