It is a fairly common practice to clone your SAS ® 9 metadata-based environment to create a backup for disaster recovery purposes. We discuss what you should consider when designing your backup strategy. The strategy could also have implications on how you should configure your production environment. AVAILABILITY AND DOWNTIME “High availability is a system design protocol and associated implementation that ensures a certain degree of operational continuity during a given measurement period. ” 1 Translated to a business analytics environment, the previous statement means: � Assure SAS applications and services are available � Support business continuity as a goal When speaking of High Availability it can be interesting to have a look at how the terms availability and downtime actually are defined. The following table, taken from Wikipedia, displays some of the common levels of availability, which is a relatively abstract measure, and what they mean in terms of downtime over a year, month, and week. The latter are basically what an IT manager is interested in when purchasing and operating a hardware component
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