Thank you. just suspected as much. -Dmitriy
On Wed, Sep 22, 2010 at 12:42 PM, Allen Wittenauer <awittena...@linkedin.com > wrote: > > On Sep 22, 2010, at 12:36 PM, Dmitriy Lyubimov wrote: > > i have a datanode maintenance question. > > > > if i bring a data node for memory upgrade down for several hours and then > return it back, i don't need to run decommission? decommission is only if i > want to get rid of that node for good and now want to re-distribute its > blocks, right? > > > Hadoop will treat it as a failure and will start re-replicating the > blocks on that node. When the node is added back into the system, it will > delete the extra replications. Those extra replications may or may not be > on the same node that you re-added. > > > > Or i will be risking some sort of 'split brain' inconsistency? > > Nah, should be fine. > >
