PRIMECLUSTER Global File Services Configuration and Administration Guide 4.1 (Linux)

4.2.3 LAN selection

In the GFS Shared File System, the MDS communications needed to obtain meta-data and to maintain consistency are processed through the LAN.

The communication path is specified by a host name. The GDS LAN can be used as a communication path.

Set up the LAN path while keeping the following in mind.

• LAN traffic volume and LAN load
• Redundant Configuration Definition for a LAN fault

The GFS Shared File System has been designed in order not to increase the LAN load. But, the load intensity can be high under certain operation conditions. When a higher load is imposed on the LAN due to another processing, the more response time may be consumed in accessing the GFS Shared File System. The LAN load status can be checked with netstat(8).

The use of the following is recommended when the load on a file system is large or when the response time is more important than other factors.

• High-speed LAN
• Private LAN

The GFS Shared File System blocks the file system on a relevant node if communication between the MDS and the node's AC. This is done because AC determines file system processing cannot be continued. Establishing a multiplex communication path by integrating several LAN paths into one logical path using GLS is recommended in order to avoid problems in the communication paths.