Aji, Your question seems to be about data (blocks) loss. Hadoop would recover by detecting the blocks you've lost from that disk failure (auto) and re-replicate their copies from the other available redundant copies in the cluster (Controlled via the configurable replication factor).
On Sat, Aug 11, 2012 at 12:08 AM, Aji Janis <[email protected]> wrote: > I am very new to Hadoop. I am considering setting up a Hadoop cluster > consisting of 5 nodes where each node has 3 internal hard drives. I > understand HDFS has a configurable redundancy feature but what happens if an > entire drive crashes (physically) for whatever reason? How does Hadoop > recover, if it can, from this situation? What else should I know before > setting up my cluster this way? Thanks in advance. > > -- Harsh J
