目的:为解决医院信息系统异地容灾备份问题,提出方案。方法:通过Oracle Data Guard,采用最大性能模式,构建容灾备份系统。结果:实践表明,创建的物理备用数据库能满足系统设计要求。结论:通过对比常用的容灾备份方案,表明采用Oracle Data...目的:为解决医院信息系统异地容灾备份问题,提出方案。方法:通过Oracle Data Guard,采用最大性能模式,构建容灾备份系统。结果:实践表明,创建的物理备用数据库能满足系统设计要求。结论:通过对比常用的容灾备份方案,表明采用Oracle Data Guard技术实现数据备份在资金、性能上的优越性。展开更多
为了解决数据丢失或损毁,经过对容灾技术的研究,提出基于Oracle Data Guard容灾技术的解决方案,介绍Data Guard容灾技术的工作原理和相关特性,并实现物理备份数据库的构建和角色切换。结果表明,该方案能有效地解决Oracle数据库的数据丢...为了解决数据丢失或损毁,经过对容灾技术的研究,提出基于Oracle Data Guard容灾技术的解决方案,介绍Data Guard容灾技术的工作原理和相关特性,并实现物理备份数据库的构建和角色切换。结果表明,该方案能有效地解决Oracle数据库的数据丢失或损毁问题,为数据的保护提供更有效的保障。展开更多
Highly security-critical system should possess features of continuous service. We present a new Robust Disaster Recovery System Model （RDRSM）. Through strengthening the ability of safe communications, RDRSM guarante...Highly security-critical system should possess features of continuous service. We present a new Robust Disaster Recovery System Model （RDRSM）. Through strengthening the ability of safe communications, RDRSM guarantees the secure and reliable command on disaster recovery. Its self-supervision capability can monitor the integrality and security of disaster recovery system itself. By 2D and 3D rea-time visible platform provided by GIS, GPS and RS, the model makes the using, management and maintenance of disaster recovery system easier. RDRSM possesses predominant features of security, robustness and controllability. And it can be applied to highly security-critical environments such as E-government and bank. Conducted by RDRSM, an important E-government disaster recovery system has been constructed successfully. The feasibility of this model is verified by practice. We especially emphasize the significance of some components of the model, such as risk assessment, disaster recovery planning, system supervision and robust communication support.展开更多
In this paper, we deal with the problem of improving backup and recovery performance by compressing redundancies in large disk-based backup system. We analyze some general compression algorithms; evaluate their scalab...In this paper, we deal with the problem of improving backup and recovery performance by compressing redundancies in large disk-based backup system. We analyze some general compression algorithms; evaluate their scalability and applicability. We investigate the distribution features of the redundant data in whole system range, and propose a multi-resolution distributed compression algorithm which can discern duplicated data at granularity of file level, block level or byte level to reduce the redundancy in backup environment. In order to accelerate recovery, we propose a synthetic backup solution which stores data in a recovery-oriented way and can compose the final data in back-end backup server. Experiments show that this algorithm can greatly reduce bandwidth consumption, save storage cost, and shorten the backup and recovery time. We implement these technologies in our product, called H-info backup system, which is capable of achieving over 10x compression ratio in both network utilization and data storage during backup.展开更多
This paper describes a method for building hot snapshot copy based on windows-file system （HSCF）. The architecture and running mechanism of HSCF are discussed after giving a comparison with other on-line backup tecb...This paper describes a method for building hot snapshot copy based on windows-file system （HSCF）. The architecture and running mechanism of HSCF are discussed after giving a comparison with other on-line backup tecbnology. HSCF, based on a file system filter driver, protects computer data and ensures their integrity and consistency with following three steps： access to open files, synchronization and copy on-write. Its strategies for improving system performance are analyzed including priority setting, incremental snapshot and load balance. HSCF is a new kind of snapshot technology to solve the data integrity and consistency problem in online backup, which is different from other storage-level snapshot and Open File Solution.展开更多
文摘目的:为解决医院信息系统异地容灾备份问题,提出方案。方法:通过Oracle Data Guard,采用最大性能模式,构建容灾备份系统。结果:实践表明,创建的物理备用数据库能满足系统设计要求。结论:通过对比常用的容灾备份方案,表明采用Oracle Data Guard技术实现数据备份在资金、性能上的优越性。
文摘为了解决数据丢失或损毁,经过对容灾技术的研究,提出基于Oracle Data Guard容灾技术的解决方案,介绍Data Guard容灾技术的工作原理和相关特性,并实现物理备份数据库的构建和角色切换。结果表明,该方案能有效地解决Oracle数据库的数据丢失或损毁问题,为数据的保护提供更有效的保障。
基金Supported by the 10th Five Year High-Tech Researchand Development Plan of China (2002AA1Z67101)
文摘Highly security-critical system should possess features of continuous service. We present a new Robust Disaster Recovery System Model （RDRSM）. Through strengthening the ability of safe communications, RDRSM guarantees the secure and reliable command on disaster recovery. Its self-supervision capability can monitor the integrality and security of disaster recovery system itself. By 2D and 3D rea-time visible platform provided by GIS, GPS and RS, the model makes the using, management and maintenance of disaster recovery system easier. RDRSM possesses predominant features of security, robustness and controllability. And it can be applied to highly security-critical environments such as E-government and bank. Conducted by RDRSM, an important E-government disaster recovery system has been constructed successfully. The feasibility of this model is verified by practice. We especially emphasize the significance of some components of the model, such as risk assessment, disaster recovery planning, system supervision and robust communication support.
基金Supported by the National Natural Science Foun-dation of China (60473023) the National Innovation Foundationfor Small Technology-Based Firms (04C26214201280)
文摘In this paper, we deal with the problem of improving backup and recovery performance by compressing redundancies in large disk-based backup system. We analyze some general compression algorithms; evaluate their scalability and applicability. We investigate the distribution features of the redundant data in whole system range, and propose a multi-resolution distributed compression algorithm which can discern duplicated data at granularity of file level, block level or byte level to reduce the redundancy in backup environment. In order to accelerate recovery, we propose a synthetic backup solution which stores data in a recovery-oriented way and can compose the final data in back-end backup server. Experiments show that this algorithm can greatly reduce bandwidth consumption, save storage cost, and shorten the backup and recovery time. We implement these technologies in our product, called H-info backup system, which is capable of achieving over 10x compression ratio in both network utilization and data storage during backup.
基金Supported by the National Natural Science Foun-dation of China (60473023) National Innovation Foundation forSmall Technology Based Firms(04C26214201280)
文摘This paper describes a method for building hot snapshot copy based on windows-file system （HSCF）. The architecture and running mechanism of HSCF are discussed after giving a comparison with other on-line backup tecbnology. HSCF, based on a file system filter driver, protects computer data and ensures their integrity and consistency with following three steps： access to open files, synchronization and copy on-write. Its strategies for improving system performance are analyzed including priority setting, incremental snapshot and load balance. HSCF is a new kind of snapshot technology to solve the data integrity and consistency problem in online backup, which is different from other storage-level snapshot and Open File Solution.
