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Determine Hardware Requirements

There are many types of clusters, and based on the cluster technology and model you choose for your application, you will have to carefully plan which hardware to purchase so that your cluster project is not hindered. Be sure to also plan for the hardware necessary to implement the network services that your application is dependent upon. Although it is not possible to make a list of hardware required for every application or cluster type, Table 1 will give you a good understanding of the hardware necessary to implement your project.

Table 1—Hardware Requirements Table

Cluster Type

Cluster Model

Hardware Needed

Network Load Balanced

N/A

Two or more servers equipped with two network interface cards per server

One network hub

One network switch (layer 2)

Failover

Single Node

One server equipped with two network interface cards per server

One server to serve as Domain Controller, DNS, and/or WINS server

External SCSI disk array

One network hub

One network switch (layer 2)

Failover

Dedicated Secondary Node

Two servers equipped with two network interface cards per server

External SCSI disk array

One server to serve as Domain Controller, DNS, and/or WINS server

One network hub

One network switch (layer 2)

Failover

Distributed Systems

Two servers equipped with two network interface cards per server

External SCSI disk array

One server to serve as Domain Controller, DNS, and/or WINS server

One network hub

One network switch (layer 2)


The table does not provide strict rules, but a general guideline. Your network may need more or less hardware, depending on the services present and the requirements of your application.

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