is it possible to merge two regions once its split ? => Yes, offline merge (via tool and table need to be disabled) is supported by almost all versions, and online merge (HBASE-7403) is supported from 0.95+, you can check that jira for more details ________________________________________ 发件人: Vimal Jain [[email protected]] 发送时间: 2014年3月6日 14:02 收件人: [email protected] 主题: Re: 答复: New region server not assigned any region
I tried to simulate it again but this master automatically handled the transition from one node to another free node. Also , is it possible to merge two regions once its split ? On Tue, Mar 4, 2014 at 8:07 PM, 冯宏华 <[email protected]> wrote: > New regionserver will be assigned regions moved out from other > regionserver by balance, and there are some reasons why balance doesn't > happen immediately after the regionserver is added to cluster: > > 1. balance isn't enabled > 2. balance interval not elapses (balance is triggered once every 5 minutes > by default) > 3. when balance chore runs, it can still refuse to do balance if: > 3.1. there are regions in transition, or > 3.2. master is processing some dead regionserver(s) > > You can use balance related commands from shell to check if balance is > turned on, or to manually trigger balance, type 'help' and look at the > balance category commands from shell > > You can also check the master log by searching 'balance' keyword to verify > whether a balance is triggered, and the reason if not(note: no log if > balance is turned off). There will be 'balance ...' log if there are > region-move due to balance > > ________________________________________ > 发件人: Vimal Jain [[email protected]] > 发送时间: 2014年3月4日 14:26 > 收件人: [email protected] > 主题: New region server not assigned any region > > Hi, > I first decommissioned a region server by using below command on master > *./graceful_stop.sh ip-10-14-24-19* > and then added back same server to the cluster by running below command ( > on that particular node ) > *hbase-daemon.sh start regionserver* > > Server is started properly but its not assigned any region. > Can you please help. > > -- > Thanks and Regards, > Vimal Jain > -- Thanks and Regards, Vimal Jain
