Please see http://hbase.apache.org/book.html#regions.arch.assignment
On Tue, Aug 25, 2015 at 10:37 AM, donmai <[email protected]> wrote: > NFS > 0.98.10 > Will get to you as soon as I am able, on travel > > Is my general understanding correct, though, that there shouldn't be any > data movement from a region reassignment? > > On Tue, Aug 25, 2015 at 12:40 PM, Ted Yu <[email protected]> wrote: > > > Can you give a bit more information: > > > > which filesystem you use > > which hbase release you use > > master log snippet for the long region assignment > > > > Thanks > > > > On Tue, Aug 25, 2015 at 9:30 AM, donmai <[email protected]> wrote: > > > > > Hi, > > > > > > I'm curious about how exactly region movement works with regard to data > > > transfer. To my understanding from the docs given an HDFS-backed > > cluster, a > > > region movement / transition involves changing things in meta only, all > > > data movement for locality is handled by HDFS. In the case where > rootdir > > is > > > a shared file system, there shouldn't be any data movement with a > region > > > reassignment, correct? I'm running into performance issues where region > > > assignment takes a very long time and I'm trying to figure out why. > > > > > > Thanks! > > > > > >
