For online merge of regions, please take a look at HBASE-7403 Cheers
On Fri, Mar 14, 2014 at 6:18 AM, Libo Yu <[email protected]> wrote: > Hi all, > > Because we have used the current time stamp in the key, as time goes on, > we have > more than more regions. After TTL expires, many of regions are empty or > almost > empty. So currently, our region servers have many regions on them but only > a small > number of them are active (receive read/write requests). > So my questions are: > > 1 How does the number of region impact the performance? What I can think > of is that > MSLAB is enabled, that will waste a lot memory. > > 2 I did some search. Hbase has utilities for merge regions and some people > suggest to > recreate the table and reload the table. But if I want to merge regions > for all the entities > on my cluster automatically, what is the best way to do it? > > Thanks, > > Linlin > > > >
