Red Hat Cluster Manager Features - Red Hat CLUSTER SUITE - CONFIGURING AND MANAGING A CLUSTER 2006 Manual

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In addition, you can cleanly stop the cluster services running on a cluster system and then
restart them on another system. This cluster-service relocation capability allows you to
maintain application and data availability when a cluster node requires maintenance.

1.1. Red Hat Cluster Manager Features

Cluster systems deployed with Red Hat Cluster Manager include the following features:
No-single-point-of-failure hardware configuration
Clusters can include a dual-controller RAID array, multiple bonded network channels,
multiple paths between cluster members and storage, and redundant uninterruptible
power supply (UPS) systems to ensure that no single failure results in application
down time or loss of data.
Note
For information about using
toAppendix C
Alternatively, a low-cost cluster can be set up to provide less availability than a no-
single-point-of-failure cluster. For example, you can set up a cluster with a single-
controller RAID array and only a single Ethernet channel.
Certain low-cost alternatives, such as host RAID controllers, software RAID without
cluster support, and multi-initiator parallel SCSI configurations are not compatible or
appropriate for use as shared cluster storage.
Cluster configuration and administration framework
Red Hat Cluster Manager allows you to easily configure and administer cluster ser-
vices to make resources such as applications, server daemons, and shared data highly
available. To create a cluster service, you specify the resources used in the cluster ser-
vice as well as the properties of the cluster service, such as the cluster service name,
application initialization (init) scripts, disk partitions, mount points, and the cluster
nodes on which you prefer the cluster service to run. After you add a cluster service,
the cluster management software stores the information in a cluster configuration file,
and the configuration data is aggregated to all cluster nodes using the Cluster Config-
uration System (or CCS), a daemon installed on each cluster node that allows retrieval
of changes to the XML-based
Red Hat Cluster Manager provides an easy-to-use framework for database appli-
cations. For example, a database cluster service serves highly-available data to a
database application. The application running on a cluster node provides network
access to database client systems, such as Web applications. If the cluster service
fails over to another node, the application can still access the shared database data. A
Chapter 1. Red Hat Cluster Manager Overview
dm-multipath
Multipath-usage.txt
/etc/cluster/cluster.conf
with Red Hat Cluster Suite, refer
File for Red Hat Enterprise Linux 4 Update 3
configuration file.