Red Hat GLOBAL FILE SYSTEM 4.7 Podręcznik Użytkownika Pobierz pdf (Strona 112)

Options for Lustre kernel modulesB–2

B.1 Overview

To support the functionality provided in HP SFS Version 2.2, the /etc/modprobe.conf and

/etc/modprobe.conf.lustre files or the /etc/modules.conf and

/etc/modules.conf.lustre files (depending on the client distribution) on the HP SFS client nodes must

be configured with the appropriate settings. You can use the sfsconfig command to modify the files

automatically (see Appendix A), or you can edit the files manually, as described in Section B.3 and

Section B.4.

(In the remainder of this Appendix, references to the /etc/modprobe.conf file can be understood to

include also the /etc/modprobe.conf.lustre file, and references to the /etc/modules.conf file

can be understood to include also the /etc/modules.conf.lustre file.)

The following configuration changes are needed to support the functionality provided in HP SFS

Version 2.2:

• The options lnet settings in the /etc/modprobe.conf or /etc/modules.conf file must be

configured to enable the client node to use the Lustre networking module (LNET) to mount Lustre file

systems.

Note the following points:

• Earlier releases of the HP SFS software used the ldap: protocol to mount file systems. In this

release, although the ldap: protocol is still supported (for backward compatibility), the lnet:

and http: protocols are preferred.

•The lnet: protocol is the protocol that will most often be used for mounting Lustre file systems.

•The ldap: protocol will not be supported in the next major release of the HP SFS software.

• To use the http: protocol, the client node must have access to the HP SFS servers over a TCP/

IP network. The http: mount protocol is intended to provide a convenient way to mount a file

system without having to specify complex lnet: options. However, it is not appropriate for use

in systems where more than 32 client nodes may be mounting a file system at the same time (for

example, when the client nodes are booted).

• You can restrict the Gigabit Ethernet interfaces that a client node uses for interaction with an HP

SFS system, by specifying options lnet settings only for the interfaces that are to be used.

• The appropriate portals_compatibility option must be specified in the options lnet

settings.

HP SFS servers that are accessed by client nodes that have not been upgraded to HP SFS Version 2.2

must run in Portals compatibility mode. To support this functionality, the portals_compatibility

option must be specified on all HP SFS client nodes.

• If any of the HP SFS systems that the client accesses is running in Portals compatibility mode, the

portals_compatibility attribute on the client node must be set to weak.

• If none of the HP SFS systems that the client accesses is running in Portals compatibility mode,

the portals_compatibility attribute on the client must be set to none.

• If quotas functionality is to be used, the appropriate lquota entries must be added to the

/etc/modprobe.conf or /etc/modules.conf

file.

See Section B.2 for examples of options lnet settings in the /etc/modprobe.conf.lustre or

/etc/modules.conf.lustre file.

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