Hi Mikhail, Thank you very much for your quick reply. I understand the process you mentioned. What I am confued is that, how this new one takes over the responsibilities in details? By the way, what is the physical relationship between backup masters and the region servers? Can a region server becomes a master?
I'm sorry that maybe my questions are simple. But I have searched answers for a long time. Thank you very much. Best, Yanglin 2014-07-03 15:45 GMT+08:00 Mikhail Antonov <[email protected]>: > Hi Yanglin, > > what exactly do you mean by "system..need to take any failover" - any > manual action by cluster admin? Failover happens automatically based on > zookeeper timeout for current active master. Currently, hbase cluster has 1 > active master and several backup masters. When backup masters notice active > master going down, they elect new one, and the new one takes over > responsibilities. > > -Mikhail > > > 2014-07-03 0:40 GMT-07:00 yl wu <[email protected]>: > > > Hi All, > > > > I've read many articles, including Bertozzi's Who needs a Master, but I > am > > still confused about the Hmaster. > > > > If the Hmaster goes down, does the system need to take any failover ? > > Or just elect a new master, and the new one can restore all the > information > > from hbase:meta? > > > > Best regards, > > Yanglin > > > > > > -- > Thanks, > Michael Antonov >
