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The basic clustering requirements for Exchange or SQL applications


The following  listed here are basic clustering requirements for both Exchange and SQL applications.

Software Requirements
Windows Server 2003, Datacenter Edition or Enterprise Edition, or above installed on all nodes.
Exchange Server.
A name resolution method such as Domain Name System (DNS).
An existing domain. All cluster nodes must be in the same domain.

Hardware Requirements
Hardware that conforms with the cluster service Hardware Compatibility List (HCL). Please refer to Windows Hardware and Driver Central Web site (http://go.microsoft.com/fwlink/?LinkId=31539) and search on clustering.
Two NICs per node.
Two storage array controllers.

Network Requirements
Access to a domain controller.
A statically assigned IP address for each network adapter on each node.
Nodes that connect to two physically independent networks:
A public interface supporting both node-to-node communication and client-to-cluster communication.
A private interface reserved for internal communication between the two nodes.
A dedicated private subnet for the cluster network.
A separate network for the storage array (a requirement when using the Intransa Storage System).

Shared Disk Requirements
All shared disks must be physically attached to the same bus.
A dedicated quorum disk (necessary for cluster management) of at least 50 MB must be available. A partition of at least 500 MB is recommended for optimal NTFS file system performance.
All disks must be configured as basic (not dynamic).
All disks must be formatted with NTFS.

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