Method for calculating availability of enterprise application system
An application system, enterprise application technology, applied in the computing field of enterprise application system availability, to achieve the effect of improving the service level of operation and maintenance
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[0016] First we use figure 1 Take a look at a typical J2EE model application system consisting of those parts:
[0017] It can be seen from the above figure that the key components mainly include middleware (WebSphere Application Server) and database (DB2) and server host (AIX, a UNIX operating system). The availability of this application system can be calculated by the following formula:
[0018] AvailabilityTOTAL=Availability operating system×Availability middleware×Availability database
[0019] To calculate the overall availability of the application system, we need to calculate the availability of individual components. "Availability" tells you the percentage of time a component is "up" compared to "down". At a simple level, it consists of two parts: first, how often does a component fail (MTTF)? Second, when it fails, how long does it take to recover (MTTR)? As long as we get the MTTF and MTTR values, we can calculate the availability of each component. Calculation ...
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