Hi, I am doing some research on the data placement, but I am not quite familiar with the Hadoop, is there any one who can tell me when a new file be added into the HDFS, which function will be called by namenode to make a decision on the allocation ( I mean, if there has a list of datanodes and the file might be larger than 64MB, that is, several blocks may be included. What's the function that decide the placement of those blocks to those datanode?)
Thanks for any help you provided!
