November 2017
Intermediate to advanced
328 pages
6h 51m
Japanese
Content preview from 入門 PySpark ―PythonとJupyterで活用するSpark 2エコシステム
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11.2
プログラムによるアプリケーションのデプロイ
221
パラメータで指定された数になります。
これですべてのパラメータを説明したので、いよいよ実践に移りましょう。
11. 2
プログラムによるアプリケーションのデプロイ
Jupyter notebook の場合とは異なり、
spark-submit
コマンドを使う場合にはアプリケーションが
適切に動作するよう
SparkSession
を用意して設定しなければなりません。
このセクションでは、
SparkSession
の生成と設定とあわせて、Spark の外部にあるモジュールの
利用方法を説明します。
Databricks
や
Microsoft Azure
（あるいはその他の
Spark
のプロバイダ）で、まだ無料のアカ
ウントを作成していなくても、心配はいりません。まだこの先もローカルマシンを使っていき
ます。これは手始めとして使いやすいからですが、アプリケーションをクラウドに持っていく
ことにした場合でも、変更しなければならないのは文字どおりジョブの投入時の
--master
パラメータだけです。
11. 2 .1
SparkSession
の設定
Jupyterを使う場合と、ジョブをプログラムから投入する場合との主な違いは、Spark（もし HiveQL
を使いたいなら Hiveも）のコンテキストを自分で作成しなければならないことです。SparkをJupyter
で動作させる場合には、コンテキストは自動的に作成されています。
このセクションでは、Uberが公開してい
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.