【作者】 余欢；

【导师】 吴敏； 黎干；

【作者基本信息】 中南大学 ， 计算机技术， 2005， 硕士

【摘要】 国税系统信息化建设力度的不断增强和电子税务的快速发展,对信息数据的完整性和系统运行的持续性提出了更为严格的要求。数据量的海量增长和信息存储模式的网络化使得税收数据的重要性日益凸显,单靠目前简单的分布式存储方式和传统的磁盘备份技术已难于满足日益发展的数据安全和持续运营需求。在税收信息建设安全管理需求的推动下,税务容灾备份系统的实现对信息系统的正常运行和日常征管工作的持续开展有着不可忽视的重大意义。 本文通过对国税系统业务和数据安全的隐患分析,针对当前系统内存在的信息孤岛、存储瓶颈和低抗灾等级问题,设计并实现了一个税务容灾备份系统。该系统共包括三大子模块:本地数据存储子系统、远程数据备份子系统和异构数据整合子系统。其中,本地数据存储子系统采用ISCSI协议构建了税务数据网络存储模式,消除了传统总线型存储模式下数据存储性能和存储需求之间的失衡现象,在集控管理模式下为税务系统提供了超大数据容量、高数据传输率和高可用性的信息存取和共享服务;远程数据备份子系统通过在异地构建一个和本地数据中心IT基础架构完全一致的备份数据中心,利用远程数据中心在地理上的分散性,基于LVR软件复制技术实现了本地和远程数据中心之间信息的实时同步,改变了过去单一数据中心模式下对大型灾难事件的零抗灾能力,提高了税务系统内应用和数据对灾难性事件的抵御能力;异构数据整合子系统采用异类数据源动态复制技术,成功屏蔽了目前系统内存在的各项异构成分。在远程数据中心直接建立的税务综合资源库,为联机分析处理、数据仓库、数据挖掘等数据增值业务提供了负载分析操作的数据土壤。三大子系统环环相扣,相互依赖,相互作用,基于分层D/R解决方案为税务系统提供不同级别的数据容灾和应用容灾保护,确保税务系统内数据的安全存储和业务的持续运营,彻底改变了过去国税部门容灾体系基础薄弱的现状。 通过在益阳市国税局中心机房搭建系统实验环境,本文对税务容灾备份系统的三大子系统分别进行了功能测试,测试结果表明该系统的设计完全达到预期目标。系统的实现改进了国税系统内信息数据的存储方式和容灾备份的恢复等级,通过降低征管等关键业务的运行风险,最大限度地保护了各项业务数据的实时性、完整性和一致性。更多还原

【Abstract】 The steady rise of the informatization in the state administration of taxation and the rapid development of the electronic taxation provide more strict demands for the integrality of the data and the continuity of the systems. The great growth of the data volume and the netlization of the informational storage pattern make the importance of the taxation data more and more apparent. Only with the present simple distributivity storage pattern and the traditional disk backup technology, we can not fulfill the demand of the data security and the service continuity. Under the force of the security management demand in the taxation informatization, the accomplishment of the taxation disaster recovery backup system has a nonnegligible and significant meaning for the normal operation of the information systems and the continuous unfolding of the daily collection and management work.By analyzing the hidden secure trouble of the business and data in the state administration of taxation and aiming at the problems in the present system, for example, the informational isolated island, storage bottle-neck, low anti-disaster grade and so on, this paper designs and implements a taxation disaster recovery backup system. The system includes three sub-systems: the local data storage sub-system, the remote data backup sub-system and the heterogeneous data conformity sub-system. Therein, by adopting the ISCSI protocol, the local data storage sub-system constructs the circuital access pattern of the taxation data. The system eliminates the unbalance phenomena between the capability and the demand of the data storage under the traditional bus storage pattern. Under the centralized control pattern, it provides the information access and shares service with the great data volume, the high speed of data transportation and the high availability for the taxation system. By remotely building a backup data center that is totally consistent with the local data center on the IT foundational fabric, the remote data backup sub-system uses the geographical dispersibility of the remote data center and adopts the LVR software replication technology. It implements the synchronous data replication between the local andremote data center, changes the zero standing capability on the great disaster event under the single data center pattern and raises the standing capability on the disaster events for the application and data in the taxation system. By adopting the dynamic replication technology between the heterogeneous data source, the heterogeneous data conformity sub-system successfully shields the various heterogeneous ingredients of the present system. The taxation integrated resource warehouse, which is directly built in the remote data center, provides the data soil loading the analytical operation for the online operative transaction, data warehouse, data mining and other data incremental services. The three sub-systems link by link, depend on each other and act on each other. Based on the layered D/R settle project, they provide data recovery and business recovery on different tiers for the taxation system, ensure the safe storage of the system data and the continuous run of the business, thoroughly change the sick status of the foundation of the disaster recovery system in the state administration of taxation.By constructing the experimental environment of the system in the central apparatus room of the Yi Yang State Administration of Taxation, this paper respectively tests the three sub-systems of the taxation disaster recovery backup system. The result indicates that the system’s design totally achieves the prospective aim. The accomplishment of the system ameliorates the storage model of the informational data and the recovery grade of the disaster backup in the state administration of taxation. By reducing the running risk of the pivotal business, for example, collection and management, the system farthest protects the real time, the integrity and the consistency of the various business data.更多还原