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Posted to user@storm.apache.org by Dominik Safaric <do...@gmail.com> on 2016/10/03 21:09:57 UTC

What determines the topology.acker.executors parameter value?

Hi Everyone, 

I’ve been curious onto the following - what determines the value of the topology.acker.executors parameter of the Storm configuration?

By default, it is equal to the number of workers. However, if for example having a single worker, consisting of for example a spout with increased parallelism, should the number of acker executors be increased as well? 

What is your experience with it? 

Dominik

Re: What determines the topology.acker.executors parameter value?

Posted by Navin Ipe <na...@searchlighthealth.com>.

        Config stormConfig = new Config();
        stormConfig.setNumWorkers(5);

https://www.google.co.in/search?q=storm+number+of+workers+ackers&ie=utf-8&oe=utf-8&client=firefox-b&gfe_rd=cr&ei=6yvzV7ysOeXx8AeNtLa4DA

On Tue, Oct 4, 2016 at 2:39 AM, Dominik Safaric <do...@gmail.com>
wrote:

> Hi Everyone,
>
> I’ve been curious onto the following - what determines the value of the
> topology.acker.executors parameter of the Storm configuration?
>
> By default, it is equal to the number of workers. However, if for example
> having a single worker, consisting of for example a spout with increased
> parallelism, should the number of acker executors be increased as well?
>
> What is your experience with it?
>
> Dominik




-- 
Regards,
Navin

Re: What determines the topology.acker.executors parameter value?

Posted by "P. Taylor Goetz" <pt...@gmail.com>.

Hi Dominik,

For the case you describe, I don’t think you’d need to increase the number of ackers. But you may want to experiment with increasing it to see if it makes a difference in performance.

-Taylor

> On Oct 3, 2016, at 5:09 PM, Dominik Safaric <do...@gmail.com> wrote:
> 
> Hi Everyone,
> 
> I’ve been curious onto the following - what determines the value of the topology.acker.executors parameter of the Storm configuration?
> 
> By default, it is equal to the number of workers. However, if for example having a single worker, consisting of for example a spout with increased parallelism, should the number of acker executors be increased as well?
> 
> What is your experience with it?
> 
> Dominik