When i use the command, it's ok.Like this: ~/hadoop/bin/hadoop dfs -ls hdfs://192.168.68.101:9000/user/hadoop/gusc
make sure the path. Good luck.瑞興 2011-01-12 gushengchang 发件人： simon 发送时间： 2011-01-12 04:04:19 收件人： hdfs-user 抄送： 主题： Re: How to get another hdfs's file directory list and meta data?(through api) Dear Harsh, Thanks for your prompt reply, I just try the command line way, but it seems doesn't work si...@nn1 $ hadoop dfs -ls "hdfs://nn2:/user/simon" ls: For input string: "" Usage: java FsShell [-ls <path>] even if I remove the ditto, the error is the same I would try multiple filesystem object way latter, Anyway, million thank you's, Harsh Best Regards, 瑞興 2011/1/12 Harsh J <qwertyman...@gmail.com> You can create multiple FileSystem objects, for different URIs and use them to query specific NNs code-wise. From command-line, a simple tricks like `u...@nn1 $ hadoop dfs -ls hdfs://nn2/dir` should work (i.e. pass entire URI of the path you're looking for). See this exact method for the code question: http://hadoop.apache.org/common/docs/current/api/org/apache/hadoop/fs/FileSystem.html#get(java.net.URI, org.apache.hadoop.conf.Configuration, java.lang.String) On Wed, Jan 12, 2011 at 1:06 AM, simon <randyh...@gmail.com> wrote: > Dear all, > I want to know if their is any class or any way to access the file list and > meta data from a remote HDFS namenode. > for example, there are two hadoop instances, which mean two namenodes (nn1 > and nn2) > If I was super user in both two hadoop instances, > and now I am in nn1, want to get nn2's file list and meta data > Is there any way to get that? > Now I could just try the most traditional way, which is > si...@nn1:~$ ssh nn2 "/hadoop/bin/hadoop fs -lsr " > and then parse the result to get each file's meta data > Is there any class or api I could use with? > My dream way is to make my own jar in nn1, through bin/hadoop jar remote.jar > remote > I can get certain directory inform of remote hdfs > thanks a lot > Best Regards, > Simon > -- Harsh J www.harshj.com
