Home | About | Sematext search-lucene.com search-hadoop.com
 Search Hadoop and all its subprojects:

Switch to Plain View
HBase >> mail # user >> Re: Region Servers Issue


+
Adam Smieszny 2013-01-02, 13:52
+
Jeff Bean 2013-01-02, 18:42
Copy link to this message
-
Re: Region Servers Issue
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" <[EMAIL PROTECTED]> 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 <[EMAIL PROTECTED]> wrote:
>
>> Redirecting to hbase-user
>>
>> Thanks,
>> Adam
>>
>>
>> On Tue, Jan 1, 2013 at 4:29 PM, Dalia Hassan <[EMAIL PROTECTED]>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
>>
+
Mohammad Tariq 2013-01-02, 21:34