HP ProLiant Cluster HA/F500 for MA8000 Enhanced DT Supplement Guide

Introduction
Disaster Tolerance
Disaster-tolerant solutions provide high levels of availability with rapid data access
recovery, no single point of failure, and continued data processing after the loss of
one or more system components in a cluster configuration. Data is simultaneously
written to both local and remote sites during normal operation. The local site is
known as the initiator site because it is in control of the operation. The remote site
is known as the target site because it is where the information is copied.
Copied data resides at both the initiator and target sites. However, in base DT cluster
configurations under normal conditions, host data access occurs only through the
initiator site. Processing will migrate to the target site and continue normal operation
if a component failure or a catastrophe occurs at the initiator site.
Product Description
The HP ProLiant Cluster HA/F500 for MA8000 Enhanced DT configuration is a
two-node cluster for Microsoft
®
Windows NT
®
Server 4.0, Enterprise Edition,
Microsoft Windows 2000 Advanced Server, or a two-to-eight-node cluster for
Microsoft Windows Server 2003, Enterprise Edition. The DT configurations use HP
ProLiant servers, StorageWorks storage subsystems, StorageWorks Data Replication
Manager (DRM) software, and StorageWorks Secure Path software.
This solution combines the failover functionality of Microsoft Cluster Server
(MSCS) with the remote data mirroring functionality of DRM. This solution also
allows for a distance of up to 100 km between the server nodes and between a
primary (local) external storage subsystem and a mirrored (remote) external storage
subsystem. The server-to-storage connection is based on a Fibre Channel switch,
using a shortwave connection, and server-to-server communication, using Ethernet
over Fibre Data Distributed Interface (FDDI) or Asynchronous Transfer Mode
(ATM) connections.
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