MDS communicates with AC by using the IP address corresponding to the host name of the node that shares the GFS Shared File System. Therefore, the host name of the shared node and the IP address are registered in host database (for example: /etc/hosts).
Note
The IP address type of the shared node needs to match the communication protocol selected in "11.2.5 Selecting a communication protocol." If they are not matched, the GFS Shared File System cannot be mounted.
Register the host name of the shared node as the canonical host name (for /etc/hosts, the host name described in the left end).
The following two IP address types are available for the GFS Shared File System:
Unique Local Unicast Address
Global Unicast Address
The setting of host database must be the same on all the shared nodes. If it is not, MDS down recovery fails and it may trigger a file system blockade or system panic.
See
For details on /etc/hosts, see hosts(5) of the online manual page.
