Installation guide

Chapter 1. Red Hat Cluster Manager Overview 7

Software

Subsystem

Components Description

fence_wti Fence agent for WTI power switch.

fenced The fence daemon. Manages the

fence domain.

DLM libdlm.so.1.0.0 Library for Distributed Lock

Manager (DLM) support.

dlm.ko Kernel module that is installed on

cluster nodes for Distributed Lock

Manager (DLM) support.

LOCK_GULM lock_gulm.o Kernel module that is installed on

GFS nodes using the

LOCK_GULM lock module.

lock_gulmd Server/daemon that runs on each

node and communicates with all

nodes in GFS cluster.

libgulm.so.xxx Library for GULM lock manager

support

gulm_tool Command that conﬁgures and

debugs the lock_gulmd server.

LOCK_NOLOCK lock_nolock.o Kernel module installed on a node

using GFS as a local ﬁle system.

GNBD gnbd.o Kernel module that implements the

GNBD device driver on clients.

gnbd_serv.o Kernel module that implements the

GNBD server. It allows a node to

export local storage over the

network.

gnbd_export Command to create, export and

manage GNBDs on a GNBD

server.

gnbd_import Command to import and manage

GNBDs on a GNBD client.

Table 1-1. Red Hat Cluster Manager Software Subsystem Components