从HDFS传输文件 [英] Transfer file out from HDFS

问题描述

我想将文件从HDFS传输到不在hadoop群集但位于网络中的其他服务器的本地文件系统。

我可以这样做：

  hadoop fs -copyToLocal< SRC> < DEST> 
，然后scp / ftp< toMyFileServer> ;.由于数据量巨大，并且由于hadoop网关机器的本地文件系统空间有限，我想要避免这种情况，并将数据直接发送到我的文件服务器。
 
 
 
请帮助一些关于如何处理这个问题的指针。
 
解决方案
因此，您可能有一个包含很多部分的文件作为您的hadoop程序的输出。
  part-r-00000 
 part-r-00001 
 part-r-00002 
 part-r-00003 
 part-r-00004 
  
所以让我们一次完成一部分？ 
 
 
  for i in`seq 0 4`; 
 do 
 hadoop fs -copyToLocal output / part-r-0000 $ i ./ 
 scp ./part-r-0000$i you @ somewhere：/ home / you / 
 rm ./part-r-0000$i 
完成
  
您可能需要查找scp的密码修饰符 
I want to transfer files out from HDFS to local filesystem of a different server which is not in hadoop cluster but in the network. 

I could have done: 
hadoop fs -copyToLocal <src> <dest>
and then scp/ftp <toMyFileServer>.
As the data is huge and due to limited space on local filesystem of hadoop gateway machine, I wanted to avoid this and sent data directly to my file server.

Please help with some pointers on how to handle this issue.
解决方案
So you probably have a file with a bunch of parts as the output from your hadoop program.
part-r-00000
part-r-00001
part-r-00002
part-r-00003
part-r-00004
So lets do one part at a time?
for i in `seq 0 4`;
do
hadoop fs -copyToLocal output/part-r-0000$i ./
scp ./part-r-0000$i you@somewhere:/home/you/
rm ./part-r-0000$i
done
You may have to lookup the password modifier for scp

                        
这篇关于从HDFS传输文件的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！