有限空间下的自治移动云存储协议

发布时间：2018-04-06 07:04

本文选题：自治移动云　切入点：存储服务　出处：《计算机科学与探索》2017年02期

【摘要】：自治移动云可以为本地区域内的移动用户提供临时的存储服务。在节点空间有限的情况下,保持数据的持久性是自治移动云存储服务的一个主要挑战。提出了一种有限空间下的自治移动云存储协议,称为SLAMS(space limited storage protocol for autonomous mobile cloud),其基本思想是通过移动节点之间周期性的信息交互,维护每个数据块在网络中的K个副本,将数据块副本按需存储在空闲空间较大的节点中。给出了SLAMS协议中的副本维护机制、数据结构和算法、SLAMS协议的详细设计。仿真实验结果表明,相对于现有的自治移动云存储协议Phoenix,SLAMS协议在节点空间有限的情况下,具有较低的数据丢失率,最大可降低50%左右;具有较短的收敛时间,最高可降低95%;具有较少的数据块存储开销,最高可降低约90%;而且SLAMS协议中数据块维持K个副本的概率明显提高,最大可提高40%左右。
[Abstract]:Autonomous mobile clouds can provide temporary storage services for mobile users in local areas.Maintaining data persistence is a major challenge for autonomous mobile cloud storage services with limited node space.An autonomous mobile cloud storage protocol called SLAMS(space limited storage protocol for autonomous mobile cloud is proposed in this paper. Its basic idea is to maintain K copies of each data block in the network through periodic information exchange between mobile nodes.A copy of the data block is stored on demand in a node with large free space.The replica maintenance mechanism, data structure and algorithm of SLAMS protocol in SLAMS protocol are designed in detail.The simulation results show that, compared with the existing autonomous mobile cloud storage protocol Phoenix SLAMS, it has a lower data loss rate and a maximum reduction of about 50% under the limited node space, and has a shorter convergence time.The maximum data block storage overhead can be reduced by about 90 percent, and the probability of data block maintaining K copies in SLAMS protocol is obviously increased, and the maximum data block storage cost can be increased by about 40%.
【作者单位】：内蒙古大学计算机学院;中国科学院计算技术研究所网络技术研究中心;
【基金】：国家自然科学基金Nos.61363079,61262017,61402446,61173133,61362011 国家重点基础研究发展计划(973计划)No.2012CB315804 内蒙古自治区教育厅高校科研项目No.NJZY16020~~
【分类号】：TP333

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