HP LH4r HP Netserver High Availability SPOFless MSCS Cluster Solution
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- HP LH4r | HP Netserver High Availability SPOFless MSCS Cluster Solution - Page 1
power modules, and fans. • Redundant Software Components: Microsoft® Cluster Server, network fault tolerance and adaptive load balancing, HBA and controller drivers using firmware that supports fail over, and software mirroring. • Fault Tolerant Techniques: hot swappable hard drives, FC controllers - HP LH4r | HP Netserver High Availability SPOFless MSCS Cluster Solution - Page 2
access redundant RAID controllers on the external storage subsystem. • Use redundant network interface controllers (NICs) configured for adaptive load balancing and fault tolerance for both public and private networks. • Install redundant power supplies and fans. • Connect the servers and external - HP LH4r | HP Netserver High Availability SPOFless MSCS Cluster Solution - Page 3
servers and the hubs to achieve longer distances between cluster components. Network Interface Controller All HP D5013 series network adapters are supported. However, for hot-plug support 2000 Advanced Server. Service Pack For the NT solution, Service Pack 6a was installed. For Windows® 2000, Service - HP LH4r | HP Netserver High Availability SPOFless MSCS Cluster Solution - Page 4
4.02.27.0 was used for testing on the Windows® 2000 Advanced Server platform. Earlier drivers may work, however they have not been tested. Supported HP Solutions The SPOF Model The cluster solution based on the RS/12FC, which has been supported by Hewlett-Packard in the past, is known as SPOF. The - HP LH4r | HP Netserver High Availability SPOFless MSCS Cluster Solution - Page 5
setup of different parameters compared to the Automatic or Assisted Configuration modes. Manual mode allows the addition of new RAID sets, addition of logical drives or editing of the existing configuration. After FC controllers have been configured they can be monitored, as can physical devices and - HP LH4r | HP Netserver High Availability SPOFless MSCS Cluster Solution - Page 6
white paper HP NetSserver Documentation FC Array Assistant Controller Information Screen FC Array Assistant Manual Configuration Screen - Mirrored LUN Mapping 6 - HP LH4r | HP Netserver High Availability SPOFless MSCS Cluster Solution - Page 7
HP drive. • Software mirroring cannot be used for the shared storage in a cluster environment, so it is highly recommended that a quorum disk be on a hardware RAID the Service Control Manager found in the control panel, and stop the cluster service. Also, change the Startup Type for the service from - HP LH4r | HP Netserver High Availability SPOFless MSCS Cluster Solution - Page 8
the current FC driver does not support dual HBA functionality in case of HBA failure. Because of this driver limitation there is still a single point of failure on each of the servers. However, the failure of an HBA or link between the server and FC hub, or between the FC array controller and FC hub - HP LH4r | HP Netserver High Availability SPOFless MSCS Cluster Solution - Page 9
and User Guide: http://netserver.hp.com/support/manuals.asp?pid=rs 12fc ·RS/12FC Installation Guide: http://netserver.hp.com/support/manuals.asp?pid=rs 12fc ·Netserver specifications: http://netserver.hp.com/ For more information about HP Netservers, go to: http://www.hp.com/go/netserver Optical or
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HP
Documentation
Netserver
HP Netserver High Availability SPOFless MSCS Cluster Solution
Introduction
This document profiles efforts in evaluating high availability cluster solutions
managed by Microsoft
®
Cluster Server in Windows NT 4.0
®
Enterprise Edition
and Windows
®
2000 Advanced Server operating systems.
The solutions
evaluated are two-node clusters using redundant Fibre Channel Arbitrated
Loop (FCAL) technology for the server to storage interconnect and are
intended to be highly reliable and highly available configurations with
No
Single Point of Failure (NSPOF)
also known in HP as
SPOFless.
High availability clusters are designed to reduce risk and costs of downtime
due to hardware or software faults.
This high level of system and application
availability is accomplished through the use of redundant and fault tolerant
technologies implemented on different levels of hardware and software.
For example, clustering software improves availability by allowing applications
and services to be transferred to another computer node if a failure event
occurs on one of the nodes.
Overview of the SPOFless System
Achieving Higher Availability through Component Redundancy
SPOFless ensures that a system will be highly available and accessible in
case of any system component failure.
Using redundant hardware and
software components eliminates single points of failure.
SPOFless system
redundancy falls into three categories.
•
Redundant Hardware Components:
system drives, RAID sets, external
storage controllers, host bus adapters (HBA), network adapters,
multiprocessor servers, Fibre Channel (FC) hubs, switches, power
supplies, processor power modules, and fans.
•
Redundant Software Components:
Microsoft
®
Cluster Server, network
fault tolerance and adaptive load balancing, HBA and controller drivers
using firmware that supports fail over, and software mirroring.
•
Fault Tolerant Techniques:
hot swappable hard drives, FC controllers,
hot plug/replace/upgrade PCI adapters, cache mirroring, and battery
backup.