2.1 Identify your scenario

If you are planning on implementing a High Availability solution then there are two possible scenarios that have different project requirements and milestones. In one scenario, you may be an existing customer who wants to convert your existing single point of failure to a High Availability component. In the other scenario, you may be a new customer building a new High Availability site. The two scenarios require different implementation steps.

It is usually easiest to build a site with High Availability. If, however, you are converting your existing single point of failure to a High Availability component then transition the architecture in such a fashion such that there is minimum impact to the site's operation. For example, converting a standalone Web server to a cluster of Web servers and a Load Balancer would require you to set up the Load Balancer with the same virtual IP that the standalone Web server used to have. The site operation would be impacted for the duration of the switchover of the virtual IP address.
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