smecsia / gawain-examples

Examples of usage the Gawain Framework

Gawain Examples

The set of examples for Gawain Framework.

Multi-node Pi approximation

You can find this example here. To launch the example, you need to do the following:

1. Clone project:

$ git clone https://github.com/smecsia/gawain-examples && cd gawain-examples

2. Launch ActiveMQ via docker-compose:

$ docker-compose up

3. Launch two nodes (in different terminals), indicating the total nodes count (2) and required precision (1000):

$ ./gradlew run -Dargs=pi,node,2,10000

4. Launch "map" part of map-reduce, indicating the nodes count and the count of numbers in set. This will randomly distribute the input set of numbers between our two nodes using the ActiveMQ queue:

$ ./gradlew run -Dargs=pi,map,2,10000

5. Launch "reduce" part of map-reduce, indicating the nodes count and the count of numbers in Nilakant set. This will initialize the reduce process on both nodes using the ActiveMQ topic:

$ ./gradlew run -Dargs=pi,reduce,2,20000

6. You should see something like the following on your screen:

Pi approx is 3.141592653589543306140794660119395....