Please see HBASE-4298 where this feature was introduced.
On Tue, Apr 26, 2016 at 5:12 AM, WangYQ wrote:
> yes, there is a tool graceful_stop.sh to graceful stop regionserver, and
> can move the regions back to the rs after rs come back.
> but i can not find the
yes, there is a tool graceful_stop.sh to graceful stop regionserver, and can
move the regions back to the rs after rs come back.
but i can not find the relation with drain region servers...
i think drain region servers function is good, but can not think up with a
pracital use case
One of use cases we use it is graceful stop of regionserver - you unload
regions from the server before you restart it. Of course, after restart you
expect HBase to move regions back.
Now I'm not really remembering correctly, but I kinda remember that one of
the features was at least that it will
Please take a look at:
bin/draining_servers.rb
On Mon, Apr 25, 2016 at 8:12 PM, WangYQ wrote:
> in hbase, I find there is a "drain regionServer" feature
>
>
> if a rs is added to drain regionServer in ZK, then regions will not be
> move to on these regionServers
>
>