I think you are confusing HDFS block balancing with HBase region deployment balancing.
You ran 'hadoop balancer', correct? This does not have anything to do with HBase. It will move file blocks around on HDFS underneath HBase. Due to problems with caching of block locations done by HBase's HDFS client, it is not advisable to move blocks around under a running HBase cluster at this time. All load balancing functions of HBase are automatic. But, they depend on having enough data in your table to make splits and deploy then the various regions around in a balanced manner. Hope this helps, - Andy > From: Rakhi Khatwani <[email protected]> > Subject: Re: Region Servers going down frequently > To: [email protected] > Date: Wednesday, April 8, 2009, 12:29 AM > Thanks, Amandeep > > One more question, i have mailed it earlier and i have > attached the snapshot along with that email. > I have noticed it that all my requests are handled by one > region server... > Is there any way to balance the load? > and will balancing the load improve the performance? > > PS: I have tried using hadoop load balancing but after some > time some of my region servers shut down... i have even > gone through the archives and someone did report an > unstable cluster due to load balancing. so i really > dont know if i should turn load balancing on?
