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 Component	Description
`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.

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