storm-user mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From sam mohel <sammoh...@gmail.com>
Subject Re: simple question about grouping
Date Mon, 23 Jan 2017 11:17:21 GMT
excuse me , if i have single spout and single bolt and the bolt doing 2
process so can i do like this
builder.setSpout("MySpout", new mySpout(), 1);
builder.setBolt("MyBolt", new MyBolt(), 4).shuffleGrouping("MySpout"); i
found this example but couldn't know why he use number 4 ?

On Mon, Jan 23, 2017 at 1:13 PM, sam mohel <sammohel5@gmail.com> wrote:

> thanks for replying
>
> On Mon, Jan 23, 2017 at 1:14 PM, Arun Mahadevan <arunm@apache.org> wrote:
>
>>
>>
>> Grouping makes sense only when you have more than one task for a bolt. If
>> your bolt has more than one task, then the grouping will decide how the
>> tuples from the spout are distributed to the individual tasks of the bolt.
>> (shuffe = random, fields = keyed on some field and so on).
>>
>>
>>
>> See http://storm.apache.org/releases/current/Concepts.html
>>
>>
>>
>> Thanks,
>>
>> Arun
>>
>>
>>
>>
>>
>> *From: *sam mohel <sammohel5@gmail.com>
>> *Reply-To: *"user@storm.apache.org" <user@storm.apache.org>
>> *Date: *Monday, January 23, 2017 at 3:09 PM
>> *To: *"user@storm.apache.org" <user@storm.apache.org>, "
>> dev@storm.apache.org" <dev@storm.apache.org>
>> *Subject: *simple question about grouping
>>
>>
>>
>> i have text file contains data . size of this file is 3.5 MB . My
>> topology consists of one spout and one bolt so is that possible to make all
>> processing in one bolt and in this case what is the role of grouping here ?
>>
>> Thanks in advance
>>
>
>

Mime
View raw message