I guess you means to set your own strategy of block distribution. If this, just hack the code as following clue: FSNamesystem.getAdditionalBlock() ---> BlockManager.chooseTarget() ---> BlockPlacementPolicy.chooseTarget(). And you need to implement your own BlockPlacementPolicy. Then if the client request addBlock RPC, the NameNode will assign DataNode to store the replicas as your rules.
2012/11/15 salmakhalil <salma_7...@hotmail.com> > What I want to do exactly is redistributing the input file fragments over > the > nodes of cluster according some calculations. I need to find the part that > starts to distribute the input file to add my code instead of. > > > > -- > View this message in context: > http://lucene.472066.n3.nabble.com/which-part-of-Hadoop-is-responsible-of-distributing-the-input-file-fragments-to-datanodes-tp4019530p4020330.html > Sent from the Hadoop lucene-dev mailing list archive at Nabble.com. >
