hybrid-mpi/README.md

# hybri-mpi  !

Instances of Ubuntu Linux with [MPICH](https://www.mpich.org) -- portable implementation of Message Passing Interface (MPI) standard. Designed for MPI program development and deployment.

##  LabInstance mpi2


![alt text](images/swarmlab-network.png "")



## Quickstart

This is a quickstart guide of howto use this *LabInstance to deploy MPI programs*

### HowTo use it


### Default Configuration 

- Working Directory

> /project

- Default user

> docker

- Default password

> docker

- Default password4root

> pass


####  Find lab workers


> ifconfig
>
> nmap -sP 172.130.0.0/24
>


#### connect to workers

```bash
 ssh docker@[IP]
```


#### Create hosts file


```bash

```


#### Compile

> mpicc -o /project/mpi_hello_world examples/mpi_hello_world.c

#### run the MPI hello world program

> mpirun -n 10 -f /home/ubuntu/hosts  /home/ubuntu/mpi_hello_world


---
**NOTE:** copy hello world to all clients

```bash
# scp hello wrold to all clients. sudo -u mpi for auto scp connect. see /home/mpi/.ssh 
while read -r line; 
 do 
   scp /project/mpi_hello_world ubuntu@$line:/project/mpi_hello_world
done < /project/hosts
```
---
 


---
**MORE INFO** 

See examples directory
```bash

 cd examples
 make mpi_hello_world
 make example ex=squares
 ...

```
---