hi, folks, a very simple question, looking forward a couple pointers.
Let's say I have a hdfs file: testfile, which only have one block(256MB), and the block has a replica on datanode: host1.hdfs.com (the whole hdfs may have 100 nodes though, and the other 2 replica are available at other datanode). If on host1.hdfs.com, I did a "hadoop fs -cat testfile" or a java client to read the file. Should I assume there won't be any significant data movement through network? That is the namenode is smart enough to give me the data on host1.hdfs.com directly? thanks Demai
