ExclamationTopology workers executors vs tasks

[patcharee <Pa...@uni.no>]

Hi,

I am new to Storm. I am running the storm starter example 
ExclamationTopology on storm cluster (version 0.10). The code snippet is 
below:

TopologyBuilder builder =new TopologyBuilder();

builder.setSpout("word",new TestWordSpout(),10);
builder.setBolt("exclaim1",new ExclamationBolt(),3).shuffleGrouping("word");
builder.setBolt("exclaim2",new ExclamationBolt(),2).shuffleGrouping("exclaim1");


However I do not understand why the Num executors and Num tasks of this 
topology (seen from the Storm UI) are both 18 (instead of 15) ? Also 
from the Storm UI, the Num executors and Num tasks of the Spout word and 
the Bolt exclaim1 and exclaim2 are 10, 3 and 2 respectively (as same as 
defined in the code).

Thanks,
Patcharee

Re: ExclamationTopology workers executors vs tasks

[Nathan Leung <nc...@gmail.com>]

Each worker process has an ack bolt.
On Mar 1, 2016 6:34 AM, "patcharee" <Pa...@uni.no> wrote:

> Hi,
>
> I am new to Storm. I am running the storm starter example
> ExclamationTopology on storm cluster (version 0.10). The code snippet is
> below:
>
> TopologyBuilder builder = new TopologyBuilder();
>
> builder.setSpout("word", new TestWordSpout(), 10);
> builder.setBolt("exclaim1", new ExclamationBolt(), 3).shuffleGrouping("word");
> builder.setBolt("exclaim2", new ExclamationBolt(), 2).shuffleGrouping("exclaim1");
>
>
> However I do not understand why the Num executors and Num tasks of this
> topology (seen from the Storm UI) are both 18 (instead of 15) ? Also from
> the Storm UI, the Num executors and Num tasks of the Spout word and the
> Bolt exclaim1 and exclaim2 are 10, 3 and 2 respectively (as same as defined
> in the code).
>
> Thanks,
> Patcharee
>