August 2015
Intermediate to advanced
312 pages
7h 28m
Japanese
Content preview from 初めてのSpark
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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.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.
282
付録 C Spark/MapReduce の機械学習ライブラリ比較検証
C.7
め
C
では、リクルートテクノロジーズで実施した
Spark
と
MapReduce
の機械学習ライブラ
リの比較検証についてご紹介しました。実運用を想定したレコメンド計算のバッチ処理について
検証を行った結果、
Spark
導入によって実行速度は約
5
〜
32
倍となり、レコメンド精度は同等の
精度を維持できることが示されました。運用の観点では、これまでサーバー増強でしか対応できな
かった処理性能上の課題を、別の手段で解決するアプローチとして大きな期待が持てる結果です。
また、開発現場の観点から見ると、
Spark
導入はアルゴリズムの開発スピードにも大きな恩恵をも
たらすと考えられます。これまで
MapReduce
で数時間かかっていた処理を
Spark
では数分で結
果を得ることができるため、
PDC
サイクルの効率に大きな改善が期待できるでしょう。
堀越 保徳（ほりこし やすのり）
株式会社リクルートテクノロジーズ勤務。元証券マン。住宅ローンの期限前償還の分析や、金利の
市場データ分析を行っていた。2013 年より現職。広告宣伝費の最適化や、レコメンドエンジン
の作成などに携わっている。趣味はバーベキュー。
濱口 智大（はまぐち ともひろ）
株式会社ＮＴＴデータ勤務。2007 年の入社以来、法人向け基幹システムの開発、運用、保守業
務を通じてインフラエンジニアとして経験を積む。2013 年より Hadoop 等を活用したデータ分
析業務に従
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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.