So my MR Job generates a report file, and that file needs to be able to be downloaded by an end-user who needs to click a button on a normal web reporting interface, and have it download the output. A
开发者_Go百科I want to do some computation with hadoop and mahout on my quad core machine, so I am using hadoop in pseudo-distributed mode.
Does Hadoop guarantee that differen开发者_JAVA百科t blocks from same file will be stored on different machines in the cluster? Obviously replicated blocks will be on different machines. No. If you loo
I know cloudera is on the forefront of providing commercial suppo开发者_运维问答rt for hadoop/hbase/hdfs.
A few months ago, we installed CLoudera Hadoop 3 in our local machine and everything was fine. Recently we also installed Whirr to start working with clusters. Although we faced some problems, after a
Is there an HDFS API that can copy an entire local d开发者_StackOverflowirectory to the HDFS? I found an API for copying files but is there one for directories?Use the Hadoop FS shell. Specifically:
What is the difference between DFSClient Protocol and FileSystem class in Hadoop DFS (HDFS). Both of these classes are used for connecting a remote client to the namenode in HDFS.
Recently, I came across a blog where the author mentioned about integrating Hbase and Hive. Will this be possible开发者_JAVA技巧 and if so what is the advantage of using both(in terms of performance a
What is the difference between hadoop distcp and hadoop distcp -update Both of them would do the same work with only slight difference in how we call them. None o开发者_运维百科f them overwrite
The Namenode in the Hadoop architecture is a single point of failure. How do people who have large Hadoop clusters cope with this pr开发者_如何学Gooblem?.
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