On Thu, Mar 8, 2012 at 1:36 PM, Ted Yu <[email protected]> wrote: > Currently Master has no knowledge about the order in which the region > servers would be restarted. > Consider this scenario: region R was hosted on RS n. > When RS n gets restarted, master assigns R to RS n+1. However, RS n+1 may > not have enough time to complete the transition before it is its turn to > restart. >
You've seen this stuff? http://hbase.apache.org/book.html#decommission After restart, you can move the regions back before moving to the next RS. Or, look at Aravind's work where he'll do a few servers at a time orchestrating it all from scripts on the outside: http://inchoate-clatter.blogspot.com/2012/03/hbase-ops-automation.html St.Ack
