User`s guide

Chapter IV. iWARP (RDMA)
Chelsio T5/T4 Unified Wire For Linux Page 70
4.2. Enabling various MPIs
4.2.1. DAPL Library configuration for Intel MPI and Platform MPI
You must set the iWARP (iw_cxgb4) module option peer2peer=1 on all systems. This can be
done by writing to the /sys/module/ file system during boot.
E.g.: For RHEL 5 and SLES platforms use following commands:
[root@host]# echo 1 > /sys/module/iw_cxgb4/parameters/peer2peer
OR
You can add the following line to /etc/modprobe.conf to set the option at module load time:
options iw_cxgb4 peer2peer=1
To run Intel MPI over RDMA interface, DAPL 2.0 should be set up as follows:
Enable the Chelsio device by adding an entry at the beginning of the /etc/dat.conf file for the
Chelsio interface. For instance, if your Chelsio interface name is eth2, then the following line
adds a DAT version 2.0 device named “chelsio2" for that interface:
chelsio2 u2.0 nonthreadsafe default libdaplofa.so.2 dapl.2.0 "eth2 0" ""
4.2.2. Setting shell for Remote Login
User needs to set up authentication on the user account on all systems in the cluster to allow
user to remotely logon or executing commands without password.
Quick steps to set up user authentication:
i. Change to user home directory
[root@host]# cd
ii. Generate authentication key
[root@host]# ssh-keygen -t rsa