Add regionserver dynamically

["Ding, Hui" <hu...@sap.com>]

Hi,

I am wondering how to add more regionservers while the instance is up?
Couldn't find sufficient information to guide me on this issue.

Thanks!
Hui

Re: Add regionserver dynamically

[Jinyeon Lee <ij...@gmail.com>]

The second answer is enough for me.
Thank you a lot.

Re: Add regionserver dynamically

[stack <st...@duboce.net>]

Jinyeon Lee wrote:
> Then, what happened region server crashed or terminated?
>   
Pardon me.  I don't understand what you are asking.  Please rephrase.

> Does hbase client ask hbase master to get new region server address?
>
>   
Yes.

After new region is added, it'll be given regions.  If client has cached 
old address for region, it will have a 'fault' when it tries to address 
the region at old location.  Client will then recalibrate by asking the 
master where the region has moved to and away we go again.

St.Ack

> Jinyeon Lee
>
> 2008/10/20 stack <st...@duboce.net>
>
>   
>> Just turn it on.
>>
>> ./bin/hbase regionserver start
>>
>> Make sure its config. is same as all other regionservers pointing at right
>> master.
>>
>> Soon as it signs in w/ master, it will be assigned regions because its
>> out-of-balance with the other regionservers (there'll be a little churn as
>> regions are shut on old regionservers to be opened on the new).
>>
>> St.Ack
>>
>>
>>
>> Ding, Hui wrote:
>>
>>     
>>> Hi,
>>>
>>> I am wondering how to add more regionservers while the instance is up?
>>> Couldn't find sufficient information to guide me on this issue.
>>>
>>> Thanks!
>>> Hui
>>>
>>>
>>>
>>>       
>>     
>
>   

Re: Add regionserver dynamically

[Jinyeon Lee <ij...@gmail.com>]

Then, what happened region server crashed or terminated?
Does hbase client ask hbase master to get new region server address?

Jinyeon Lee

2008/10/20 stack <st...@duboce.net>

> Just turn it on.
>
> ./bin/hbase regionserver start
>
> Make sure its config. is same as all other regionservers pointing at right
> master.
>
> Soon as it signs in w/ master, it will be assigned regions because its
> out-of-balance with the other regionservers (there'll be a little churn as
> regions are shut on old regionservers to be opened on the new).
>
> St.Ack
>
>
>
> Ding, Hui wrote:
>
>> Hi,
>>
>> I am wondering how to add more regionservers while the instance is up?
>> Couldn't find sufficient information to guide me on this issue.
>>
>> Thanks!
>> Hui
>>
>>
>>
>
>

Re: Add regionserver dynamically

[stack <st...@duboce.net>]

Just turn it on.

./bin/hbase regionserver start

Make sure its config. is same as all other regionservers pointing at 
right master.

Soon as it signs in w/ master, it will be assigned regions because its 
out-of-balance with the other regionservers (there'll be a little churn 
as regions are shut on old regionservers to be opened on the new).

St.Ack


Ding, Hui wrote:
> Hi,
>
> I am wondering how to add more regionservers while the instance is up?
> Couldn't find sufficient information to guide me on this issue.
>
> Thanks!
> Hui
>
>