Red Hat GLOBAL FILE SYSTEM 4.7 Betriebsanweisung PDF herunterladen (Seite 70)

Mounting and unmounting Lustre file systems on client nodes4–12

After the /etc/sfstab.proto file shown above is processed by the SFS service, the /etc/sfstab file

on the delta1 node will include the following lines:

##################### BEGIN /etc/sfstab.proto SECTION #####################

lnet://35@elan0,34@elan0:/south-mds3/client_elan /usr/data sfs server=south,fs=data

0 0

lnet://35@elan0,34@elan0:/south-mds4/client_elan /usr/scratch sfs

server=south,fs=scratch 0 0

lnet://35@elan0,34@elan0:/south-mds5/client_elan /usr/test sfs server=south,fs=test

0 0

# ###################### END /etc/sfstab.proto SECTION ######################

The /etc/sfstab file on the delta2 node will include the following lines:

##################### BEGIN /etc/sfstab.proto SECTION #####################

lnet://35@elan0,34@elan0:/south-mds3/client_elan /usr/data sfs server=south,fs=data

0 0

lnet://35@elan0,34@elan0:/south-mds4/client_elan /usr/scratch sfs

server=south,fs=scratch 0 0

###################### END /etc/sfstab.proto SECTION ######################

Any existing node-specific lines in the /etc/sfstab file remain unchanged.

4.7.2.1 Tips for editing the /etc/sfstab.proto file

The SFS service does not simply replace the contents of the /etc/sfstab file with information from the

/etc/sfstab.proto file. Instead (as explained in Section 4.7.2) the SFS service only replaces the

content for which it is responsible. Typically, if you are creating an /etc/sfstab.proto file for the first

time, you will delete the old /etc/sfstab file. If you do not delete the file, the next time you boot the client

or start the SFS service, the new /etc/sfstab file will contain the original content and the new content

from the /etc/sfstab.proto file.

You can test whether your /etc/sfstab.proto file is working correctly by using the gensfstab option

with the service sfs command, as follows:

# service sfs gensfstab

This command creates a new /etc/sfstab file but does not mount or otherwise process the

/etc/sfstab file.

4.7.3 The service sfs start command

If the SFS service has not already been started on the client node, entering the service sfs start

command mounts all of the file systems listed in the /etc/sfstab file.

If the SFS service has already been started when the service sfs start command is entered, the

command behaves in the same way as the service sfs reload command (see Section 4.7.4).

4.7.4 The service sfs reload command

The service sfs reload command cancels pending mount operations, then reloads the

/etc/sfstab file and mounts any entries that are not already mounted.

4.7.5 The service sfs stop command

The service sfs stop command unmounts all Lustre file systems specified in the /etc/sfstab file.

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Red Hat GLOBAL FILE SYSTEM 4.7 Betriebsanweisung Seite 70