Hi. I think one needs to run balancer in order to clean out the redundant blocks.
Can anyone confirm this? Regards. 2009/4/28 Piotr <[email protected]> > Hi > > What happens when the node rejoins then ? > > - The replication level of several blocks increases ? > - The old replicas are removed in favor of new replicas ? (Or the new > ones) > > regards > Piotr > > 2009/4/27 Stas Oskin <[email protected]> > > > Thanks. > > > > 2009/4/27 Koji Noguchi <[email protected]> > > > > > > http://hadoop.apache.org/core/docs/current/hdfs_design.html#Data+Disk+Fa > > > ilure%2C+Heartbeats+and+Re-Replication< > > > http://hadoop.apache.org/core/docs/current/hdfs_design.html#Data+Disk+Fa%0Ailure%2C+Heartbeats+and+Re-Replication > > > > > > > > > hope this helps. > > > > > > Koji > > > > > > -----Original Message----- > > > From: Stas Oskin [mailto:[email protected]] > > > Sent: Monday, April 27, 2009 4:11 AM > > > To: [email protected] > > > Subject: Blocks replication in downtime even > > > > > > Hi. > > > > > > I have a question: > > > > > > If I have N of DataNodes, and one or several of the nodes have become > > > unavailable, would HDFS re-synchronize the blocks automatically, > > > according > > > to replication level set? > > > And if yes, when? As soon as the offline node was detected, or only on > > > file > > > access? > > > > > > Regards. > > > > > >
