Novell LINUX ENTERPRISE 11 - HIGH AVAILABILITY, Руководство пользователя, Страница: 7 / 298

About This Guide
SUSE® Linux Enterprise High Availability Extension is an integrated suite of open
source clustering technologies that enables you to implement highly available physical
and virtual Linux clusters. For quick and efficient configuration and administration,
the High Availability Extension includes both a graphical user interface (GUI) and a
command line interface (CLI).
This guide is intended for administrators who need to set up, configure, and maintain
High Availability (HA) clusters. Both approaches (GUI and CLI) are covered in detail
to help the administrators choose the appropriate tool that matches their needs for per-
forming the key tasks.
The guide is divided into the following parts:
Installation and Setup
Before starting to install and configure your cluster, make yourself familiar with
cluster fundamentals and architecture, get an overview of the key features and
benefits, as well as modifications since the last release. Learn which hardware and
software requirements must be met and what preparations to take before executing
the next steps. Perform the installation and basic setup of your HA cluster using
YaST.
Configuration and Administration
Add, configure and manage resources, using either the GUI or the
crm
command
line interface. Learn how to make use of load balancing and fencing. In case you
consider writing your own resource agents or modifying existing ones, get some
background information on how to create different types of resource agents.
Storage and Data Replication
SUSE Linux Enterprise High Availability Extension ships with a cluster-aware file
system (Oracle Cluster File System, OCFS2) and volume manager (clustered
Logical Volume Manager, cLVM). For replication of your data, the High Availabil-
ity Extension also delivers DRBD (Distributed Replicated Block Device) which
you can use to mirror the data of a high availabilitly service from the active node
of a cluster to its standby node.