Have a read of the replication feature design: http://hadoop.apache.org/common/docs/r0.20.0/hdfs_design.html#Data+Replication :)
On Thu, Mar 17, 2011 at 9:59 PM, Andrew Rothstein <andrew.rothst...@gmail.com> wrote: > If I'm using a replication factor of 3 and I write a block of data > will my write operation block until the data is present on 3 nodes? No. > will it block until the data is present on 1 node and asynchronously > replicate from there to 2 other nodes? Yes! -- Harsh J http://harshj.com