Changes between Version 2 and Version 3 of waue/2009/1028

Timestamp:

Oct 28, 2009, 5:49:19 PM (15 years ago)

Author:

waue

Comment:

--

waue/2009/1028

@@ -1 +1 @@
  * !FuseAlert.java 100% finished and testing finished
+
+注意要點：
+1. the output is difference between Map and Reduce class !
+{{{
+#!java
+                
+                // 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);
+}}}
+
+2. 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
+
+3. 在map 與 reduce class內宣告重要參數，需用全名，如 int 改為 Integer 較佳