September 2013
Intermediate to advanced
264 pages
5h
Chinese
Content preview from Bad Data 技術手冊
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165
第十三章
臥庫表，藏網路
Bobby Norton
「你得道了嗎？」
「不。我並沒有得道的喜悅，相反的，卻被一種寂滅的悲哀環繞。」
—在
臥虎藏龍
中，玉嬌龍對李慕白描述壞資料（或類似的事情）的影響
若資料好到某種程度，那麼它就能夠被快速的分析並且產生一些有用的資訊。使用好的
資料，我們能夠學習關於這個世界的一些東西、增進收益、減低成本或是降低風險。
然而，當資料以錯誤的表示方式呈現時，它的價值很可能會因為一些複雜性而被隱藏
起來。
讓我們從許多 IT 密集的企業所會面對到且看起來簡單的問題開始：追蹤是誰要支付企
業所產生的費用。以下僅舉幾個費用的種類：伺服器、軟體授權、支援合約、資料中心
的租賃、Amazon 的 EC2 成本、團隊建設的軟體以及對應的支援。當企業成長時，而要
支持企業的成本也跟著成長，不用多久就會有人問：「我們付出了什麼？」
從一個董事或是企業經營者的角度來看，在企業中的部門並不是平均的分享資源的。因
此，若要將成本平均分攤給整個企業的部門則是不合理的。這樣做可能會將特定部門並不
賺錢且應該被關閉的事實給隱藏了起來。對一個大企業來說，這可能是好幾億元的問題。
163
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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.