Hi, On Fri, Aug 23, 2013 at 10:05 PM, Viswanathan J <[email protected]> wrote: > Hi, > > We are planning to upgrade our production hdfs cluster from 1.0.4 to 1.2.1 > > So if I directly upgrade the cluster, it won't affect the edits, fsimage and > checkpoints?
Yes, an upgrade won't affect those. > Also after upgrade is it will read the blocks, files from the data nodes > properly? Yes. > Is the version id conflict occurs with NN? Not sure what you mean, but there shouldn't be a problem as long as all service nodes and client nodes are upgraded to the same version. > Do I need lose the data after upgrade? You won't lose data after an upgrade. -- Harsh J
