包含标签 hadoop articles

常用hadoop dfs命令

创建目录 1hadoop dfs -mkdir /home 上传文件或目录到hdfs 1hadoop dfs -put hello / 2hadoop dfs -put hellodir/ / 查看目录 1hadoop dfs -ls / 创建一个空文件 1hadoop dfs -touchz /361way 删除一个文件 1hadoop dfs -rm /361way 删除一个目录 1hadoop dfs -rmr /home 重命名 1hadoop dfs -mv /hello1 /hello2 查看文件 1hadoop dfs -cat /hello 将制定目录下的所有内容merge成一个文件,下载到本地 1hadoop dfs -getmerge /hellodir wa 使用du文件和目录大小 1hadoop dfs -du / 将目录拷贝到本地……

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开源日志系统比较:scribe、chukwa、kafka、flume

1. 背景介绍 许多公司的平台每天会产生大量的日志(一般为流式数据,如,搜索引擎的pv,查询等),处理这些日志需要特定的日志系统,一般而言,这些系统需要具有以下特征: (1) 构建应用系统和分析系统的桥梁,并将它们之间的关联解耦; (2) 支持近实时的在线分析系统和类似于Hadoop之类的离线……

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