197
NAS 4000s and 9000s Administration Guide
10
Cluster Administration
One important feature of the HP StorageWorks NAS server is that it can operate as a single
node or as a cluster. This chapter discusses cluster installation and cluster management issues.
Some of these topics are discussed or mentioned elsewhere in this guide. The discussion in this
chapter is more detailed than other references and addresses the unique administration
procedures for operating in a clustered environment.
Cluster Overview
As introduced in chapter 1, two server heads (nodes) can be connected to each other and
deployed as a no single point of failure (NSPOF) dual redundant cluster. The nodes are
connected by a crossover cable and are each connected to network switches or hubs. This
connection allows communication between the nodes to track the state of each cluster node.
Each node sends out periodic messages to the other node; these messages are called heartbeats.
If a node stops sending messages, the cluster service will fail over any resources that the node
owns to the other node. For example, if the node that owns the Quorum disk is shut down for
any reason, its heartbeat will stop. The other node detects the lack of the heartbeat and takes
over ownership of the Quorum disk and the cluster.
Multi Node Support Beyond Two Nodes
The NAS 4000s and 9000s devices may be deployed in multi node clustering beyond two
nodes. Refer to the associated Storage Array documentation to determine the number of nodes
supported by the array under Windows Storage Server 2003. While the discussion presented in
this guide addresses only two nodes, additional nodes may be added into the cluster.
Considerations for additional fiber path connections and the private network should be made.
In the case of the private network, a hub or switch is required since the cross over cable is no
longer applicable.
Содержание NAS 4000s
Страница 18: ...About this Guide 18 NAS 4000s and 9000s Administration Guide ...
Страница 50: ...Basic Administrative Procedures and Setup Completion 50 NAS 4000s and 9000s Administration Guide ...
Страница 92: ...Disk Management 92 NAS 4000s and 9000s Administration Guide ...
Страница 196: ...NetWare File System Management 196 NAS 4000s and 9000s Administration Guide ...
Страница 246: ...Index 246 NAS 4000s and 9000s Administration Guide ...