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From Dalia Sobhy <dalia.mohso...@hotmail.com>
Subject Re: Region Servers Issue
Date Wed, 02 Jan 2013 21:27:23 GMT
How to run hbase balancer given that I am using cloudera manager 4.1

Sent from my iPad

On Jan 2, 2013, at 9:13 PM, "Jeff Bean" <jwfbean@cloudera.com> wrote:

> Hi Dalia,
> 
> If all the regions are still on the first server you don't get the benefit
> of the second server. Try running the hbase balancer after adding the
> second server. Then check to make sure each server is serving the same
> number of regions.
> 
> Jeff
> 
> On Wed, Jan 2, 2013 at 5:52 AM, Adam Smieszny <adams@cloudera.com> wrote:
> 
>> Redirecting to hbase-user
>> 
>> Thanks,
>> Adam
>> 
>> 
>> On Tue, Jan 1, 2013 at 4:29 PM, Dalia Hassan <daliahassan0@gmail.com>wrote:
>> 
>>> Dear all,
>>> 
>>> I am trying to test the performance of hbase by increasing number of
>>> nodes.
>>> 
>>> I am running a Java Program that uses Aggregate Implementation
>>> Coprocessor i.e count the number of rows based on a specific filter. Then I
>>> am testing by increasing the number of region servers will the time taken
>>> to execute this program will less or not ? Suppose it will be.
>>> 
>>> But unfortunately, it produces the same time.
>>> 
>>> What I am doing actually is:
>>> 
>>>   1. I have the number of rows to be 4 million.
>>>   2. Then I ran the code, given that the cluster contains one region
>>>   server , the time was approximately 16 seconds.
>>>   3. After that I added another region server to the cluster i.e so now
>>>   cluster has 2 region servers.
>>>   4. By running the code, it took the same app 16 seconds.
>>> 
>>> 
>>> So my question is what to do to feel the difference ? Also by adding a
>>> second region server, will the 2 million records move to it ? If so, how
>>> much time will it take ?
>>> 
>>> Thanks,
>>> 
>>> Waiting for your responses asap.
>> 
>> 
>> 
>> --
>> Adam Smieszny
>> Cloudera | Systems Engineer | http://www.linkedin.com/in/adamsmieszny
>> 917.830.4156
>> 

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