Lustre 1.6 Operations Manual

4.2 Quick Configuration of Lustre
As already discussed, Lustre consists of four types of subsystems – a Management
Server (MGS), a Metadata Target (MDT), Object Storage Targets (OSTs) and clients.
All of these can co-exist on a single system or can run on different systems. Together,
the OSSs and MDS together present a Logical Object Volume (LOV) which is an
abstraction that appears in the configuration.
It is possible to set up the Lustre system with many different configurations by using
the administrative utilities provided with Lustre. Some sample scripts are included
in the directory where Lustre is installed. If you have installed the source code, the
scripts are located in the lustre/tests sub-directory. These scripts enable quick
setup of some simple, standard configurations.
The next section describes how to use these scripts to install a simple Lustre setup.
4.2.1 Simple Configurations
The procedures in this section describe how to set up simple Lustre configurations.
4.2.1.1 Module Setup
Make sure the modules (like LNET) are installed in the appropriate /lib/modules
directory. The mkfs.lustre and mount.lustre utilities automatically load the
correct modules.
1. Set up module options for networking should first be set up by adding the
following line in /etc/modprobe.conf or modprobe.conf.local
# Networking options, see /sys/module/lnet/parameters NO \
../lnet/parameters dir
2. Add the following line.
options lnet networks=tcp
# alias lustre llite -- remove this line from existing modprobe.conf
#(the llite module has been renamed to lustre)
# end Lustre modules
The clients and the MDT are notified that there is a new OST on-line and are
immediately able to use it.
4-4 Lustre 1.6 Operations Manual • September 2008