Red Hat GLOBAL FILE SYSTEM 4.7 Podręcznik Użytkownika Pobierz pdf (Strona 24)

Installing and configuring HP XC systems2–4

When you have finished configuring the options lnet and lquota settings, proceed to Section 2.2.3

to complete the remaining additional configuration tasks.

2.2.3 Step 3: Completing other configuration tasks on the head node

To complete the configuration of the head node, perform the following tasks:

1. Configure interconnect interfaces (see Section 2.2.3.1).

2. Configure the NTP server (see Section 2.2.3.2).

3. Configure firewalls (see Section 2.2.3.3).

4. Configure the slocate package (see Section 2.2.3.4).

2.2.3.1 Configuring interconnect interfaces

This section describes specific configuration steps that you may need to perform depending on the

interconnect type and configuration that is used in the HP SFS system.

The section is organized as follows:

• Configuring Gigabit Ethernet interfaces (Section 2.2.3.1.1)

• Configuring Voltaire InifiniBand interfaces (Section 2.2.3.1.2)

No specific configuration steps are required for Quadrics or Myrinet interconnects.

2.2.3.1.1 Configuring Gigabit Ethernet interfaces

If a client node uses more than one Gigabit Ethernet interface to connect to an HP SFS system, the

arp_ignore parameter must be set to 1 for each client node interface that is expected to be used for

interaction with Lustre file systems. This setting ensures that a client node only replies to an ARP request if

the requested address is a local address configured on the interface receiving the request.

You can set the arp_ignore value for an interface after a client node has been booted; you can also

configure a node so that the arp_ignore value is set automatically when the node is booted, by adding

the arp_ignore definition to the /etc/sysctl.conf file.

For example, if a client node uses interfaces eth1 and eth2 for interaction with an HP SFS system, both of

these interfaces must have the arp_ignore parameter set to 1. To set this value on a running client node,

enter the following commands:

# echo "1" > /proc/sys/net/ipv4/conf/eth1/arp_ignore

# echo "1" > /proc/sys/net/ipv4/conf/eth2/arp_ignore

To configure the head node so that the values are automatically set when the node is booted, add the

following lines to the /etc/sysctl.conf file:

net.ipv4.conf.eth1.arp_ignore = 1

net.ipv4.conf.eth2.arp_ignore = 1

It is possible to restrict the interfaces that the client nodes uses to communicate with the HP SFS system by

editing the options lnet settings in the /etc/modprobe.conf file; see Appendix B.

2.2.3.1.2 Configuring Voltaire InifiniBand interfaces

If the head node uses an InfiniBand interconnect to connect to an HP SFS system, you must configure the

IP address of the head node manually.

At an earlier stage in the process of installing the HP XC system, you specified a base address for the

InfiniBand network—this address is in the /opt/hptc/config/base_addr.ini file. You can use this

base address to work out the appropriate IP address for the head node.

Note that unless you configure an IP address for the InfiniBand network manually at this point, you will not

be able to mount any file systems as described later in Section 2.2.6.

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