On Sat, May 8, 2010 at 6:08 PM, Ryan Rawson <ryano...@gmail.com> wrote:
> > 2. "no rebalancing required" means that the blocks of HDFS files for > regions > > need not be moved from one datanode to another. > > So when you add nodes to a new cluster, unless you are running the > HDFS balancer, data does not migrate. I disagree that the HDFS balancer really helps here. Yes, it will migrate data to the new datanode, but the data that it migrates is not at all tied to the access patterns of HBase (ie it won't choose to migrate blocks that are part of the regions that got migrated to the new regionserver) -Todd -- Todd Lipcon Software Engineer, Cloudera
