Abstract
The cloud environment capitalizes on the built-in redundancy of the large number of servers that make them up by enabling high levels of availability and reliability for applications. In this paper, we address the availability problem of the heterogeneous distributed clusters in the cloud and propose an availability allocation model with the goal of maximizing the system reliability. The allocation model involves three kinds of services according to the coupling classification. And the availability analysis scheme is designed for each coupling type. Besides, the prior knowledge of all the server availability value is imported to simplify the service disposal and achieve an optimal solution in a short time. The experiments show that this algorithm finds a good initial solution for availability allocation problem.
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