Hi, I have a couple of questions about the process of uploading a large file (> 10GB) to HDFS.
To make sure my understanding is correct, assuming I have a cluster of N machines. - What happens in the following: Case 1: assuming i want to uppload a file (input.txt) of size K GBs that resides on the local disk of machine 1 (which happens to be the namenode only). if I am running the command -put input.txt {some hdfs dir} from the namenode (assuming it does not play the datanode role), then will the namenode read the first 64MB in a temporary pipe and then transfers it to one of the cluster datanodes once finished? Or the namenode does not do any reading of the file, but rather asks a certain datanode to read the 64MB window from the file remotely? Case 2: assume machine 1 is the namenode, but i run the -put command from machine 3 (which is a datanode). who will start reading the file? -- Best Regards, Karim Ahmed Awara -- ------------------------------ This message and its contents, including attachments are intended solely for the original recipient. If you are not the intended recipient or have received this message in error, please notify me immediately and delete this message from your computer system. Any unauthorized use or distribution is prohibited. Please consider the environment before printing this email.