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MPI Installation and Configuration

• Have a look to the section Repository Settings and ensure that you have the common repo files
• Before starting the installation procedure remember to clean all yum cache and headers:

yum clean all

MPI Service installation on CE-CREAM

Follow the CE-CREAM installation guide before starting to follow this steps below

yum install mpi-start glite-yaim-mpi

MPI Service installation on WN

Follow the WN installation guide before starting to follow this steps below

yum install mpi-start glite-yaim-mpi
yum install openmpi openmpi-devel mpich2

• Have a look to the MPI documentation before starting to install: MPI Guides.

Service Configuration

Useful Variables

Remember to copy these three files in your service directory:

• glite-mpi
• glite-mpi_ce
• glite-mpi_wn

Please set properly the variables in the files in service directory. In particular customize this important values:

YAIM Verification

• Before starting the configuration PLEASE TEST that you have defined all the mandatory variables for the MPI profile

• • On CE-CREAM MPI Verification

 /opt/glite/yaim/bin/yaim -v -s <site-info.def> -n MPI_CE -n creamCE -n TORQUE_server -n TORQUE_utils 

• • On WN MPI Verification

 /opt/glite/yaim/bin/yaim -v -s <site-info.def> -n MPI_WN -n WN_torque_noafs 

You can find in this documentation: YAIM MPI Variables all mandatory variables.

If no errors are reported during the verification you can proceed to the configuration, otherwise correct them before continuing.

YAIM Configuration

• Please use the debug flag ( "-d 6") to configure the services in order to have detailed information.
• For your convenience yo can save all the configuration information in a log file for each configuration separately, different from the default yaimlog, that contins all the history of all configurations.

• • On CE-CREAM

 /opt/glite/yaim/bin/yaim -c -d 6 -s <site-info.def>  -n MPI_CE -n creamCE -n TORQUE_server -n TORQUE_utils 2>&1 | tee /root/conf_EMI_CREAM_Torque_MPI.`hostname -s`.`date +%Y-%m-%d-%H-%M-%S`.log 

• • On WN

  /opt/glite/yaim/bin/yaim -c -d 6 -s <site-info.def> -n MPI_WN -n WN_torque_noafs  2>&1 | tee /root/conf_WN_Torque_MPI.`hostname -s`.`date +%Y-%m-%d-%H-%M-%S`.log 

Check files in WN

If in YAIM Configuration you are chose to use MPI_SSH_HOST_BASED_AUTH (well-advised) check these files:

• /etc/ssh/sshd_config
• /etc/ssh/shosts.equiv

The first one sshd_config should have the follow variables set like below

HostbasedAuthentication yes 
IgnoreUserKnownHosts yes
IgnoreRhosts yes

The second file shosts.equiv should contains: the CE hostname, the default SE host name and all the WNs hostname. May be in the CE it was created in configuration process, copy it form the CE.

Restart sshd services after file modification:

service sshd restart

Service Testing - Reference Card

After service installation to have a look if all were installed in a proper way, you could have a look to User & Service Troubleshooting Guide. In this page you can find some common errors and other useful service information.

MPI Documentation References:

• Functional Description
  
• Software Requirement Specification
  
• Software Design Description
  
• User Guide
  
• Man Pages/Online Help: Manual and Command Line Options
  
• Client Installation and Configuration
  
• User & Service Troubleshooting Guide
  
• System Administrator Guides
  
• Service Reference Card