摘要： 1. hadoop streaming原理介绍 http://blog.csdn.net/azhao_dn/article/details/7290762 2. demo http://www.michael-noll.com/tutorials/writing-an-hadoop-mapreduce-program-in-python/ 阅读全文

摘要： http://blog.163.com/jiayouweijiewj@126/blog/static/171232177201081994553310/ 判断文件是否存在 hadoop fs -test -e /hdfs_dir if [ $? -ne 0 ]; then echo "Directory not exists!" fi if [ $? -ne 1 ]; then... 阅读全文