wiki:waue/2009/1028

Version 4 (modified by waue, 15 years ago) (diff)

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  • FuseAlert.java 100% finished and testing finished

注意要點:

  1. the output is difference between Map and Reduce class !
        
        // set Map output key and value class
        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(LongWritable.class);
        // set Reduce output key and value class
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(Text.class);
    
  1. 由於時間的位元長度過長,故20090101595959 已經超過 intWritable 的定址範圍

改為 0101595959 用 longWritable 宣告

  1. 在map 與 reduce class內宣告重要參數,需用全名,如 int 改為 Integer 較佳