Re: HBase Load Balancer

[Ted Yu]

StochasticLoadBalancer takes care of both request counts and number of
regions.

hbase.master.balancer.stochastic.regionCountCost controls the weight for
region count, default to 500.

hbase.master.balancer.stochastic.readRequestCost controls read request
weight, default to 5.

hbase.master.balancer.stochastic.writeRequestCost controls write request
weight, default to 5.

For second part of question, see
http://hbase.apache.org/book.html#arch.regions.size

On Thu, Sep 28, 2017 at 3:33 PM, alwin james  wrote:

> Hi Team -
>
> Does load balancer balance the load based on read/write requests received
> or is it just based on the number of regions assigned to a regionserver?
>
> Also, is there any recommendation or good practices available on the number
> of regions that can be handled by a regionserver?
>
> Regards,
> Alwin
>

Re: HBase load balancer

[Jean-Marc Spaggiari]

Hi Azuryy,

I don't think this is possible but you ca duplicate the default HBase
balancer and modify it so it just balance one table..

But what do you want to only balance one?

JM

2013/6/3 Azuryy Yu azury...@gmail.com:
 Hi,

 Does anybody can tell me how to configure load balancer to balance just one
 table.

 Thank.

Re: HBase load balancer

[Azuryy Yu]

Hi JM,
Thanks. actually I expect load balancer work at table level, not region
level. does that possible here?


On Tue, Jun 4, 2013 at 9:41 AM, Jean-Marc Spaggiari jean-m...@spaggiari.org
 wrote:

 Hi Azuryy,

 I don't think this is possible but you ca duplicate the default HBase
 balancer and modify it so it just balance one table..

 But what do you want to only balance one?

 JM

 2013/6/3 Azuryy Yu azury...@gmail.com:
  Hi,
 
  Does anybody can tell me how to configure load balancer to balance just
 one
  table.
 
  Thank.

Re: HBase load balancer

[Jean-Marc Spaggiari]

Take a look into the balancer code.

It's called for each table. So if it's not a table you want to
balance, just return an empty plan...

JM

2013/6/3 Azuryy Yu azury...@gmail.com:
 Hi JM,
 Thanks. actually I expect load balancer work at table level, not region
 level. does that possible here?


 On Tue, Jun 4, 2013 at 9:41 AM, Jean-Marc Spaggiari jean-m...@spaggiari.org
 wrote:

 Hi Azuryy,

 I don't think this is possible but you ca duplicate the default HBase
 balancer and modify it so it just balance one table..

 But what do you want to only balance one?

 JM

 2013/6/3 Azuryy Yu azury...@gmail.com:
  Hi,
 
  Does anybody can tell me how to configure load balancer to balance just
 one
  table.
 
  Thank.

Re: HBase load balancer

[Azuryy Yu]

Thanks JM, I will read balancer code to get more.


On Tue, Jun 4, 2013 at 9:50 AM, Jean-Marc Spaggiari jean-m...@spaggiari.org
 wrote:

 Take a look into the balancer code.

 It's called for each table. So if it's not a table you want to
 balance, just return an empty plan...

 JM

 2013/6/3 Azuryy Yu azury...@gmail.com:
  Hi JM,
  Thanks. actually I expect load balancer work at table level, not region
  level. does that possible here?
 
 
  On Tue, Jun 4, 2013 at 9:41 AM, Jean-Marc Spaggiari 
 jean-m...@spaggiari.org
  wrote:
 
  Hi Azuryy,
 
  I don't think this is possible but you ca duplicate the default HBase
  balancer and modify it so it just balance one table..
 
  But what do you want to only balance one?
 
  JM
 
  2013/6/3 Azuryy Yu azury...@gmail.com:
   Hi,
  
   Does anybody can tell me how to configure load balancer to balance
 just
  one
   table.
  
   Thank.
 

Re: HBase load balancer

[Ted Yu]

bq. I expect load balancer work at table level

In 0.94, load balancer performs per-table load balancing.

On Mon, Jun 3, 2013 at 6:48 PM, Azuryy Yu azury...@gmail.com wrote:

 Hi JM,
 Thanks. actually I expect load balancer work at table level, not region
 level. does that possible here?


 On Tue, Jun 4, 2013 at 9:41 AM, Jean-Marc Spaggiari 
 jean-m...@spaggiari.org
  wrote:

  Hi Azuryy,
 
  I don't think this is possible but you ca duplicate the default HBase
  balancer and modify it so it just balance one table..
 
  But what do you want to only balance one?
 
  JM
 
  2013/6/3 Azuryy Yu azury...@gmail.com:
   Hi,
  
   Does anybody can tell me how to configure load balancer to balance just
  one
   table.
  
   Thank.
 

Re: HBase load balancer

[Azuryy Yu]

Thanks, Ted. I am using 0.94.7 now.


On Tue, Jun 4, 2013 at 10:04 AM, Ted Yu yuzhih...@gmail.com wrote:

 bq. I expect load balancer work at table level

 In 0.94, load balancer performs per-table load balancing.

 On Mon, Jun 3, 2013 at 6:48 PM, Azuryy Yu azury...@gmail.com wrote:

  Hi JM,
  Thanks. actually I expect load balancer work at table level, not region
  level. does that possible here?
 
 
  On Tue, Jun 4, 2013 at 9:41 AM, Jean-Marc Spaggiari 
  jean-m...@spaggiari.org
   wrote:
 
   Hi Azuryy,
  
   I don't think this is possible but you ca duplicate the default HBase
   balancer and modify it so it just balance one table..
  
   But what do you want to only balance one?
  
   JM
  
   2013/6/3 Azuryy Yu azury...@gmail.com:
Hi,
   
Does anybody can tell me how to configure load balancer to balance
 just
   one
table.
   
Thank.
  
 

Re: HBase load balancer

[Jeremy Carroll]

Need to update this badly. But in a quick pinch, this will load balance one
table.

https://github.com/phobos182/hadoop-hbase-tools/blob/master/hbase/hbase_table_balancer.rb




On Mon, Jun 3, 2013 at 7:50 PM, Azuryy Yu azury...@gmail.com wrote:

 Thanks, Ted. I am using 0.94.7 now.


 On Tue, Jun 4, 2013 at 10:04 AM, Ted Yu yuzhih...@gmail.com wrote:

  bq. I expect load balancer work at table level
 
  In 0.94, load balancer performs per-table load balancing.
 
  On Mon, Jun 3, 2013 at 6:48 PM, Azuryy Yu azury...@gmail.com wrote:
 
   Hi JM,
   Thanks. actually I expect load balancer work at table level, not region
   level. does that possible here?
  
  
   On Tue, Jun 4, 2013 at 9:41 AM, Jean-Marc Spaggiari 
   jean-m...@spaggiari.org
wrote:
  
Hi Azuryy,
   
I don't think this is possible but you ca duplicate the default HBase
balancer and modify it so it just balance one table..
   
But what do you want to only balance one?
   
JM
   
2013/6/3 Azuryy Yu azury...@gmail.com:
 Hi,

 Does anybody can tell me how to configure load balancer to balance
  just
one
 table.

 Thank.