info

README.md

@@ -1,2 +1,93 @@
-# examples-mpi2
+# mpi & Open JDK !
 
+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 "")
+
+
+
+
+[inspired by NLKNguyen](https://github.com/NLKNguyen/alpine-mpich)
+
+
+## Quickstart
+
+This is a quickstart guide of howto use this *LabInstance to deploy MPI programs*
+
+### HowTo use it
+
+
+- On step "*1. Select Git Repo*" [see here](http://docs.swarmlab.io/SwarmLab-HowTos/HowTo-create-lab.adoc.html) 
+choose "*examples-mpi*" 
+
+- On step "*2. Select swarm service*" choose "*ondemand_mpi2_master*"
+
+- On step "*3. Save Lab Instance*" put the name you want
+
+- Save it. 
+
+Your are ready to run your fresh *LabInstance* [see here](http://docs.swarmlab.io/SwarmLab-HowTos/HowTo-create-lab.adoc.html#_run_instance)
+  
+
+### Default Configuration 
+
+- Working Directory
+
+> /ubuntu
+
+- Default user for MPI
+
+> ubuntu
+
+- Buid-in Web Server
+ 
+---
+**INFO**
+
+*Lab_Instance Name* = The name you give [here](http://docs.swarmlab.io/SwarmLab-HowTos/HowTo-create-lab.adoc.html#_step_3_save_lab_instance)
+
+You can also find [here](http://docs.swarmlab.io/SwarmLab-HowTos/index.adoc.html#_main_lab_intance_interface)
+
+Usage: 
+
+> touch /var/www/html/[name]/file
+
+---
+
+
+- The host file that contains addresses of connected workers can be created with:
+
+> 
+> get_hosts > /ubuntu/hosts
+> 
+
+- Compile
+
+> mpicc -o /ubuntu/mpi_hello_world examples/mpi_hello_world.c
+
+- run the MPI hello world program
+
+> sudo -u mpi mpirun -n 10 -f /ubuntu/hosts  /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 
+   sudo -u mpi scp /ubuntu/mpi_hello_world ubuntu@$line:/ubuntu/mpi_hello_world
+done < /ubuntu/hosts
+```
+---
+ 
+
+---
+**MORE INFO** 
+
+See swarmlab and examples directory
+---

examples/Makefile

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+all: config install log
+
+config: 
+
+	/bin/bash ./runbefore
+
+install:
+
+	/bin/bash ./run
+
+log:
+
+	/bin/bash ./runafter

examples/mpi_hello_world.c

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+#include <mpi.h>
+#include <stdio.h>
+
+int main(int argc, char** argv) {
+  // Initialize the MPI environment. The two arguments to MPI Init are not
+  // currently used by MPI implementations, but are there in case future
+  // implementations might need the arguments.
+  MPI_Init(NULL, NULL);
+
+  // Get the number of processes
+  int world_size;
+  MPI_Comm_size(MPI_COMM_WORLD, &world_size);
+
+  // Get the rank of the process
+  int world_rank;
+  MPI_Comm_rank(MPI_COMM_WORLD, &world_rank);
+
+  // Get the name of the processor
+  char processor_name[MPI_MAX_PROCESSOR_NAME];
+  int name_len;
+  MPI_Get_processor_name(processor_name, &name_len);
+
+  // Print off a hello world message
+  printf("Hello world from processor %s, rank %d out of %d processors\n",
+         processor_name, world_rank, world_size);
+
+  // Finalize the MPI environment. No more MPI calls can be made after this
+  MPI_Finalize();
+}
+

examples/run

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+#!/bin/bash
+
+# compile
+mpicc -o /ubuntu/mpi_hello_world i./mpi_hello_world.c
+
+# scp hello wrold to all clients. sudo -u mpi for auto scp connect. see /home/mpi/.ssh 
+while read -r line; 
+ do 
+    scp /ubuntu/mpi_hello_world ubuntu@$line:/ubuntu/mpi_hello_world
+done < /ubuntu/hosts
+
+# cd to work dir
+cd /ubuntu
+
+# run it! 
+ mpirun -n 10 -f /ubuntu/hosts  /ubuntu/mpi_hello_world  2>&1 | tee /tmp/output.log
+

examples/runafter

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+#!/bin/bash
+
+echo "do more jobs"
+#cat /tmp/output.log

examples/runbefore

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+#!/bin/bash
+
+get_hosts > /ubuntu/hosts
+