基于秘密共享方案的可生存存储系统可用性评价

An Evaluation Method for Availability of Survivable Storage System on Secret-Sharing Scheme

高可用性是可生存存储系统所追求的目标之一,而基于秘密共享方案的可生存存储系统可用性评价方法比较缺乏。本文提出了一种简单可用性评价方法和一种基于马尔可夫链模型的可用性评价方法,并给出了二者的描述模型与计算模型,然后分别利用两种评价方法对基于秘密共享方案的可生存存储系统进行了可用性评价,进而对结果进行了详细分析,并讨论了两种可用性评价方法的应用范围。两种可用性评价方法不仅可以实现对基于秘密共享方案的可生存存储系统可用性的科学评价,而且可以分析得出影响系统可用性的元素,为设计合理的高可用可生存存储系统提供了支持。

High-Availability is one of the goals Survivable Storage System pursuing, and there are few evaluation methods for Availability of Survivable Storage System on Secret-Sharing Scheme. A Simple Evaluation Method for Availability（SEMA） and a Markov-chained Evaluation Method for Availability（ MEMA） are both proposed, and their description and calculation model are also given. Availability of Survivable Storage System on Secret-Sharing Scheme is evaluated separately by the two evaluation methods, and the results are analyzed in details. In addition, the application scopes of the two evaluation methods are discussed. The two evaluation methods can evaluate Availability of Survivable Storage System on Secret-Sharing Scheme and find the factors affecting the Availability, which is helpful to design a High-Availability Survivable Storage System.