August 2015
Intermediate to advanced
312 pages
7h 28m
Japanese
Content preview from 初めてのSpark
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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.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.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.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.
4
1 章 Spark によるデータ分析への招待
す
†
。
1.2.3
Spark Streaming
Spark Streaming
は、データのライブストリームの処理を実現する
Spark
のコンポーネントで
す。データストリームの例としては、実働環境の
Web
サーバーが生成するログファイルや、
Web
サービスのユーザーがポストするステータスの更新情報を含むメッセージのキューなどがありま
す。
Spark Streaming
が提供するデータストリームの操作のための
API
は、
Spark Core
の
RDD
API
とほぼぴったり一致するので、プログラマーにとっては、このプロジェクトについて学び、メ
モリ上、ディスク上、あるいはリアルタイムにやってくるデータを操作するアプリケーション間を
行き来することは容易です。
Spark Streaming
は、
API
の下位層では、
Spark Core
と同等のフォー
ルトトレランス、スループット、スケーラビリティを持つように設計されています。
1.2.4
MLlib
Spark
には、一般的な機械学習（
ML
）の機能を含むライブラリとして、
MLlib
があります。
MLlib
は、分類、回帰、クラスタリング、協調フィルタリングを含む複数の種類の機械学習のア
ルゴリズムを提供すると共に、モデルの評価やデータのインポートといった支援機能も持っていま
す。
MLlib
はまた、一般的な勾配降下最適化アルゴリズムを含む、低レベルの
ML
プリミティブ
群も提供しています。これらのメソッド群は、すべてクラスタに対してスケールアウトできるよう ...
Become an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
and much more.
Read now
Unlock full access
More than 5,000 organizations count on O’Reilly
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.