hadoop 回收站的trash 默认是 关闭的， 你只要在 conf/core-site.xml 里面开启就可以了 view code php ? hadoop.tmp.dir /usr/hadoop/tmp a base for other temporary directories.? fs.default.name hdfs://192.168.1.192:9000?!--下面的代码就是开启hadoop
hadoop 回收站的trash 默认是 关闭的， 你只要在 conf/core-site.xml 里面开启就可以了
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? hadoop.tmp.dir /usr/hadoop/tmp a base for other temporary directories.? fs.default.name hdfs://192.168.1.192:9000?? fs.trash.interval 1440 number of minutes between trash checkpoints. if zero, the trash feature is disabled. ?
1440 是设置回收站保存的时间， 单位分钟 这里我设置一天:1440 = 60*24
2、测试回收站功能
看下我dfs 下面的文件
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[hadoop@master conf]$ hadoop fs -ls found 3 itemsdrwxr-xr-x - hadoop supergroup 0 2013-01-13 17:00 /user/hadoop/.trashdrwxr-xr-x - hadoop supergroup 0 2013-01-10 21:02 /user/hadoop/intodaydrwxr-xr-x - hadoop supergroup 0 2013-01-10 21:03 /user/hadoop/outtoday[hadoop@master conf]$ hadoop fs -ls intodayfound 2 items-rw-r--r-- 1 hadoop supergroup 2 2013-01-10 21:02 /user/hadoop/intoday/file1.txt-rw-r--r-- 1 hadoop supergroup 2 2013-01-10 21:02 /user/hadoop/intoday/file2.txt[hadoop@master conf]$
可以看到indoday 里面有file1.txt 跟file2.txt, 下面把intoday 这个目录删除
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[hadoop@master conf]$ hadoop fs -rmr intodaymoved to trash: hdfs://192.168.1.192:9000/user/hadoop/intoday[hadoop@master conf]$
提示moved to trash ，说明文件已经删除到回收站了
看看回收站里面有没有
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[hadoop@master conf]$ hadoop fs -lsfound 2 itemsdrwxr-xr-x - hadoop supergroup 0 2013-01-13 17:10 /user/hadoop/.trashdrwxr-xr-x - hadoop supergroup 0 2013-01-10 21:03 /user/hadoop/outtoday[hadoop@master conf]$ hadoop fs -ls /user/hadoop/.trash found 2 itemsdrwxr-xr-x - hadoop supergroup 0 2013-01-13 16:45 /user/hadoop/.trash/1301131700drwxr-xr-x - hadoop supergroup 0 2013-01-13 17:10 /user/hadoop/.trash/current //这个文件就是回收站里面的文件 ， 你可以用 -ls 具体查看
3 删除了当然要回复，下面恢复下回收站的文件
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[hadoop@master conf]$ hadoop fs -mv .trash/current/user/hadoop/intoday intoday[hadoop@master conf]$ hadoop fs -ls found 3 itemsdrwxr-xr-x - hadoop supergroup 0 2013-01-13 17:10 /user/hadoop/.trashdrwxr-xr-x - hadoop supergroup 0 2013-01-10 21:02 /user/hadoop/intodaydrwxr-xr-x - hadoop supergroup 0 2013-01-10 21:03 /user/hadoop/outtoday[hadoop@master conf]$ hadoop fs -ls intodayfound 2 items-rw-r--r-- 1 hadoop supergroup 2 2013-01-10 21:02 /user/hadoop/intoday/file1.txt-rw-r--r-- 1 hadoop supergroup 2 2013-01-10 21:02 /user/hadoop/intoday/file2.txt
可以看到 intoday 文件已经回复 ，file1.txt file2.txt 也已经恢复
4、清空回收站命令：hdfs dfs -expunge
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原文地址：hadoop学习笔记 – 回收站机制的开启, 感谢原作者分享。