Book Image

Distributed Machine Learning with Python

By : Guanhua Wang
Book Image

Distributed Machine Learning with Python

By: Guanhua Wang

Overview of this book

Reducing time cost in machine learning leads to a shorter waiting time for model training and a faster model updating cycle. Distributed machine learning enables machine learning practitioners to shorten model training and inference time by orders of magnitude. With the help of this practical guide, you'll be able to put your Python development knowledge to work to get up and running with the implementation of distributed machine learning, including multi-node machine learning systems, in no time. You'll begin by exploring how distributed systems work in the machine learning area and how distributed machine learning is applied to state-of-the-art deep learning models. As you advance, you'll see how to use distributed systems to enhance machine learning model training and serving speed. You'll also get to grips with applying data parallel and model parallel approaches before optimizing the in-parallel model training and serving pipeline in local clusters or cloud environments. By the end of this book, you'll have gained the knowledge and skills needed to build and deploy an efficient data processing pipeline for machine learning model training and inference in a distributed manner.
Table of Contents (17 chapters)
1
Section 1 – Data Parallelism
6
Section 2 – Model Parallelism
11
Section 3 – Advanced Parallelism Paradigms

Chapter 7: Implementing Model Parallel Training and Serving Workflows

In this chapter, we will discuss how to implement a simple model parallelism pipeline. As opposed to data parallelism, where each GPU holds a full copy of a model, in model parallelism, we need to split a model properly among all GPUs in use.

Before diving into the details, we'll qualify our discussion with the following assumptions about both hardware and workload:

  • We will use homogenous GPUs for the same model parallel training or serving job.
  • Each model training or serving task will occupy the whole hardware exclusively, which means there will be no preemption or interruption during the running of our model training or serving task.
  • For GPUs within a machine, they are connected with either PCIe, NVLink, or NVSwitch.
  • For GPUs among different machines, they are connected with general Ethernet links of 10 Gbps to 100 Gbps bandwidth.
  • For the model parallel training part, we will mainly...