If you run any HDFS client operations on your NameNode box or if
another service running on the NameNode machine accesses HDFS, they
will register as a Read/Write client traces on the DataNodes. It isn't
the NameNode that reads the blocks usually.
On Mon, Oct 8, 2012 at 12:30 PM, Li Shengmei wrot
Hi, all
I read the namenode.log and found there are HDFS_READ/WRITE
operations from namenode to datanode. That is to say, the datanodes read
blocks from namenode. I want to know what kind of blocks that the datanodes
read from namenode? Should the blocks stored in datanodes, shouldn't tha
