标签：hdfs
在hdfs中，默认的文件删除保留的时间是0，也就是没有保留删除的文件，删除即丢失
那么如果你想启用hdfs的回收站机制，在删除文件后，希望多久之后，文件才消失，因为这个过程中万一你想来恢复文件呢
<property>
<name>fs.trash.interval</name>
<value>1440</value>
</property>
[root@com22 bin]# sh hdfs dfs -ls -R /flume/events/2015/01/28/15/55 -rw-r--r-- 3 root supergroup 12207 2015-01-28 15:56 /flume/events/2015/01/28/15/55/cmcc.1422431701282 [root@com22 bin]# sh hdfs dfs -rm /flume/events/2015/01/28/15/55/cmcc.1422431701282 15/03/05 14:28:00 INFO fs.TrashPolicyDefault: Namenode trash configuration: Deletion interval = 1440 minutes, Emptier interval = 0 minutes. Moved: 'hdfs://com22.authentication:9000/flume/events/2015/01/28/15/55/cmcc.1422431701282' to trash at: hdfs://com22.authentication:9000/user/root/.Trash/Current [root@com22 bin]#
整个过程如下：
[root@com22 bin]# sh hdfs dfs -ls -R /flume/events/2015/01/28/15/55 [root@com22 bin]# sh hdfs dfs -ls -R /user/root/.Trash/Current drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events/2015 drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events/2015/01 drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events/2015/01/28 drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events/2015/01/28/15 drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events/2015/01/28/15/55 -rw-r--r-- 3 root supergroup 12207 2015-01-28 15:56 /user/root/.Trash/Current/flume/events/2015/01/28/15/55/cmcc.1422431701282 [root@com22 bin]# sh hdfs dfs -mv /user/root/.Trash/Current/flume/events/2015/01/28/15/55/cmcc.1422431701282 /flume/events/2015/01/28/15/55 [root@com22 bin]# sh hdfs dfs -ls -R /user/root/.Trash/Current drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events/2015 drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events/2015/01 drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events/2015/01/28 drwx------ - root supergroup 0 2015-03-05 14:28 /user/root/.Trash/Current/flume/events/2015/01/28/15 drwx------ - root supergroup 0 2015-03-05 14:31 /user/root/.Trash/Current/flume/events/2015/01/28/15/55 [root@com22 bin]# sh hdfs dfs -ls -R /flume/events/2015/01/28/15/55 -rw-r--r-- 3 root supergroup 12207 2015-01-28 15:56 /flume/events/2015/01/28/15/55/cmcc.1422431701282 [root@com22 bin]#
【hadoop 2.6】hdfs如何打开回收站机制trash，恢复删除的文件
标签：hdfs
原文地址：http://blog.csdn.net/simonchi/article/details/44081977
