2.3. GFS Software Components

Table 2.1, “GFS Software Subsystem Components” summarizes the GFS software components.

Table 2.1. GFS Software Subsystem Components

Software ComponentDescription
gfs.ko Kernel module that implements the GFS file system and is loaded on GFS cluster nodes.
lock_dlm.ko A lock module that implements DLM locking for GFS. It plugs into the lock harness, lock_harness.ko and communicates with the DLM lock manager in Red Hat Cluster Suite.
lock_nolock.ko A lock module for use when GFS is used as a local file system only. It plugs into the lock harness, lock_harness.ko and provides local locking.