Hi All, Kindly clarify our doubts mentioned below
1.Did Separate machines/nodes needed for Namenode ,Jobtracker, Slavenodes 2. If hadoop is configured in multinode cluster(with One machine as namenode and jobtracker and other machine as slave. Namenode acts as a slave node also) . How to handle the namenode failovers?. If the name node fails, will it be possible to get the contents of file which i process in slave datanodes 3.This question is inter-related with second question. Incase of namenode failovers , Can slave nodes can be configured and can act as a namenode for itself and can take the control of the other slave nodes 4.If at all I rebuild the namenode again after a failover. How would old multinode cluster set up is reproduced again. How to rebuild the same multinode cluster set up similar to the previous one 5.Can we take backup and restore the files written to hadoop 6.There is no possibility of rewriting the same file in the hadoop (HDFS) Expecting the detailed answers earnestly. -M.Shiva -- View this message in context: http://www.nabble.com/Some-Doubts-of-hadoop-functionality-tp14431884p14431884.html Sent from the Hadoop Users mailing list archive at Nabble.com.
