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From Jane Tao <jiao....@oracle.com>
Subject Re: multiple region servers at one machine
Date Thu, 17 Jul 2014 21:53:23 GMT
Hi Ted,

In my case, there is a 6 Node HBase cluster setup (running on Oracle BDA).
Each node has plenty of RAM (64GB) and CPU cores. Several articles seem 
to suggest
that it is not a good idea to allocate too much RAM to region server's 
heap setting.

If each region server has 10GB heap and there is only one region server 
per node, then
I have 10x6=60GB for the whole HBase. This setting is good for ~100M 
rows but starts
to incur lots of GC activities on region servers when loading billions 
of rows.

Basically, I need a configuration that can fully utilize the free RAM on 
each node for HBase.

On 7/16/2014 4:17 PM, Ted Yu wrote:
> Jane:
> Can you briefly describe the use case where multiple region servers are
> needed on the same host ?
> Cheers
> On Wed, Jul 16, 2014 at 3:14 PM, Dhaval Shah <prince_mithibai@yahoo.co.in>
> wrote:
>> Its certainly possible (atleast with command line) but probably very
>> messy. You will need to have different ports, different log files,
>> different pid files, possibly even different configs on the same machine.
>> Regards,
>> Dhaval
>> ________________________________
>>   From: Jane Tao <jiao.tao@oracle.com>
>> To: user@hbase.apache.org
>> Sent: Wednesday, 16 July 2014 6:06 PM
>> Subject: multiple region servers at one machine
>> Hi there,
>> Is it possible to run multiple region servers at one machine/node? If
>> this is possible, how to start multiple region servers with command
>> lines or cloudera manager?
>> Thanks,
>> Jane
>> --


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