close Warning: Can't synchronize with repository "(default)" (Unsupported version control system "svn": /usr/lib/python2.7/dist-packages/libsvn/_delta.so: failed to map segment from shared object: Cannot allocate memory). Look in the Trac log for more information.

Changes between Version 8 and Version 9 of NCTU100407


Ignore:
Timestamp:
Apr 13, 2010, 4:17:50 PM (16 years ago)
Author:
jazz
Comment:

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  • NCTU100407

    v8 v9  
    3434 * 題組二：
    3535  * 已知 java 語法中，extends 代表繼承自父類別，implement 代表實作某介面(Interface,類似 C++ 多重繼承)，請根據 WordCount 範例程式(wordcount.java)，繪製 UML 類別圖（如下圖）。(20%)
     36    * [[Image(wiki:NCTU100407:wordcount_uml.jpg)]]
    3637  * 以 hadoop 0.20.2 預設的 conf 目錄為輸入，使用 hadoop fs -put conf input 上傳檔案至 HDFS，請嘗試在 wordcount 範例程式中加入 system.out.println，並回答 map() 函數輸入的 key 內容為何？(20%)
    3738  * 乘上題，根據 wordcount 執行過程，當單機執行時，請問同時有幾個 mapper 被執行？並請參考以下圖形，繪製單機運作時 mapper 與 reducer 運作順序。(20%)