josonle / mapreduce-demo Goto Github PK
View Code? Open in Web Editor NEWHadoop，MapReduce编程学习练手实例
License: MIT License
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linbingfeng dpcc2017 dudefu ljwkevin eaglepan zac7070 helloworldlian liuxianghua zhuangxuward jianpingh shaobooo wzhpgit 18515593521 quietclickcode dongjun2046 ffffffllllll muzidi olivialalala tydhome linyixxx haigangyuan wxyz yangli0226 loujasper flying-crane joecubar dengyikang gdzhiwenwu zhishanlingyun jnliyan1 dilligent-yi yxiaochun blissseven qzgfather leslielee1997 peteruixi tao-usions 1218292511 bonette0901 wangguiyu joy-ful bandiandian jsk-cpp kikisc123mapreduce-demo's Issues
Problem_6_合并多个小文件_v0
version: Hadoop-2.6.5
我将您的MergeJob 里的 setJarClass 改成了MergeJob 且发现需要增加 job.setOutputKeyClass(Text.class);
job.setOutputValueClass(BytesWritable.class); 不然集群提交运行时会报错
因为是初学者, 说下我的情况,希望后来者能更快开发
因为默认reduce task num = 1,最终part-r-00000 格式为 key(文本1_name):value(即文本1_context), key(文本2_name):value(即文本2_context),
sequenceFile 读取见此文 https://www.cnblogs.com/skyl/p/4769542.html
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