浅析Oracle数据库中的DataGuard容灾备份技术

论述了数据容灾备份的概念以及了DataGuard概述,从DataGuard关键技术、工作原理等方面分析了Oracle DataGuard容灾技术的高可靠性和高安全性。     

一种自动管理的高可用架构的实现

结合实际生产业务要求,利用Oracle11g的DataGuard技术,通过本地部署主备数据库实现高可用架构,通过远端级联第二个备库实现异地容灾的要求。在DataGuard的搭建过程中,配置Broker工具实现自动管理DataGuard,在此基础上,设置FSFO和快速闪回恢复区实现本地主数据库故障时自动切换到备库,以及在备库快速闪回恢复区没有被归档日志撑满之前主库得到正常恢复,Broker能够自动恢复DataGuard的配置,从而真正实现高效的、自动的高可用架构。     

DG和RAC技术在电力营销数据库中的应用

目前贵州电网电力营销技术支持采用的是地市局集中，以后逐步过渡到省级集中或南网集中，因此，数据安全和业务高可用性及其重要。采用Oracle 10GRAC架构和Oracle 10G DataGuard数据备灾技术，由备库对主库实施备份操作，既保证了业务高可用性、又保证了数据的高安全性。     

Oracle DataGuard在异地容灾中的分析与应用

对于高度依赖信息以及信息集中的企业来说,如何尽量降低数据灾难给企业带来的负面影响是需要高度重视的问题。对Or-acle DataGuard技术进行了简要介绍,构建了异地容灾数据保护模式,给出了异地容灾实现的结构图和具体实例的实现步骤,结果表明能够达到异地容灾的目的。     

Oracle DataGuard在异地容灾中的分析与应用

对于高度依赖信息以及信息集中的企业来说,如何尽量降低数据灾难给企业带来的负面影响是需要高度重视的问题,对Oracle DataGuard技术进行了简要介绍,构连了异地容灾数据保护模式,给出了异地容灾实现的结构图和具体实例的实现步骤,结果表明能够达到异地容灾的目的。     

怎样鉴别真假明基刻录盘

明基BenQ的CD-R/RW刻录盘在市面上一直非常热销，因此也就成了不法JS的“热点”，对于消费者来说，买到假冒的明基BenQ盘片不但白花了冤枉钱，而且仿冒产品不具备明基特有的DataGuard专利数据保护技术，更有可能加速损耗刻录机的寿命，造成更大的损失，那究竟如何分辨真假B的刻录盘呢？     

0racleDataGuard容灾技术的研究与实现

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OracleDataGuard容灾技术的解决方案,介绍DataGuard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。     

基于DG和RAC的电力营销数据灾备技术

数据备份是防范数据库灾难的重要手段,也是防止Oracle数据库发生介质故障的惟一方式。目前贵州电网电力营销技术支持采用的是地市局集中.以后逐步过渡到省级集中或南网集中,因此,数据安全和业务高可用性及其重要。采用Oracle10G RAC架构和Oracle 10G DataGuard数据备灾技术,由备库对主库实施备份操作,既保证了业务高可用性、又保证了数据的高安全性。     

[Oracle数据库灾备技术探讨

随着信息系统的发展，保持业务数据的持续性是企业用户进行数据存储时必须考虑的重要方面。然而灾难的出现，可能导致生产停顿、用户满意度降低，企业的竞争力会因此大打折扣。这样，在灾难后如何快速、正确地恢复业务系统就成为摆在企业面前的一个难题。本文重点讨论Oracle数据库的DataGuard，GoldenGate和CDP灾备技...     

首款皮革纹面壳YEPO 757V MP3上市

继不久前推出16X DVD盘片后，BenQ再次在个性化盘片上下功夫，这次为电影发烧友带来的是16X的电影系列DVD盘片。电影系列DVD盘片拥有“导演椅”和“电影隔板”两种不同的电影元素封面，让你过足“导演瘾”。独创的PicFect影像传真技术让BenQ DVD刻录片的PI甚至比世界DVD论坛组织所规定的标准PI值还要低一半，可杜绝马赛克、停格等不良状况发生，提供更完美的画质；针对DVD刻录片保存，BenQ研发出独家DataGuard X技术．整合了银合金反射层．超级AZ3记录层、抗UV高张力基板与无缝胶合技术，BenQ 16X DVD刻录盘为影音数据提供有力保护，再不会有数据“不翼而飞”的意外发生。     

基于Oracle DataGuard技术的航空情报系统设计

通过oracle dataguard技术,为航空情报系统设计一套高可用性和高可靠性的灾备系统,实现系统主备份设备的快速切换和灾难性恢复,可以有效解决数据库中数据丢失或破坏等一系列问题。     

A practical operator support scheme and its application to safety-ensured object break using dual-arm machinery

A practical operator support system for disaster response work using construction machinery is applied to object-break operations using a dual-arm machine. An object-break operation, which separates an object into two different parts by applying massive pulling force, requires skillful force and trajectory controls. Operators typically have trouble visually perceiving the movement of the manipulator because the target object is strongly restrained. As a result, after the object has been separated into two pieces, the operator may continue performing lever operations because of unavoidable perception reaction time and the manipulator may collide with the surrounding environment. A control input cancellation system based on object-break identification is proposed to reduce the time difference between the object break and operation stoppage. A support system for disaster response situations must be safe and efficient and accommodate operators with various skill levels; thus, common physical phenomena related to the object breakage should be exploited. The system cancels control inputs to stop the movement of the manipulator when an object-break flag is detected, which is defined as a situation where the force applied to each joint of a manipulator decreases rapidly when a lever operation and load on the inside of the grapple are detected. Demolition experiments were conducted using a hydraulic dual-arm system. The results indicate that the displacement of the end-point after the object breaks is greatly decreased and the completion time of the task is reduced as well.     

基于虚拟化技术的灾备系统模型研究

针对传统灾备系统中维护管理难、资源利用率低、可扩展性差等不足,提出了基于虚拟化技术设计灾备系统的思路,分析了服务器虚拟化、网络虚拟化、存储虚拟化等关键技术,研究并设计了以资源池管理为中心,融合需求分析、容灾备份、灾难恢复、灾备演练、灾难预警等环节的灾备系统模型。最后,通过测试验证了虚拟化灾备系统在系统恢复性能上远远好于传统灾备系统。     

P2P cloud network services for IoT based disaster situations information

In order to cope with disaster situations properly, it is very important to identify the disaster scale and provide the accurate information of the site to the appropriate authorities including disaster site and Central Disaster Management Center, on-site command post, etc. and share the information provided. In particular, sharing information on disaster situations should control the disaster quickly to prevent the disaster situation from lasting and expanding. However, in the event of a large-scale disaster, delay is caused in the existing commercial network and therefore, the disaster situation cannot be communicated quickly and accurately. In order to determine the situation exactly in the event of a disaster, safety and connectivity of the network and flow of data are very important. Even if the stability of the network and connection of nodes are resolved in the network of each agency business operator, it is necessary to share the platform between networks for IoT/M2M communication for the smooth flow of data. Recently, the disaster safety net of combining existing disaster standard technology with Ubiquitous Technology and Smart IT such as Tetra of Europe, iDEN of the U.S., etc. has been built for disaster safety communications. In addition, systems useful for demand-centered, site-centered immediate disaster response by using Mobile, SNS, cloud computing, etc. are being built and designed to play an important role in the disaster information system especially through IoT, P2P cloud network, big data, etc. Therefore, in this paper, we proposed the P2P cloud network service for IoT based disaster situations information according to the paradigm of the changing times. The proposed service is to combine IoT/M2M network with P2P cloud service for rapid and smooth response in the event of a disaster and provide the results as social services such as SNS. To this end, the wide area wireless disaster information network system has been built in the local and each local network is connected to each other to provide disaster situations by using the server of the disaster area. At this time, each server was to be interconnected via P2P network and to be connected automatically by software-based network in P2P Cloud System. Also, the cognitive cycle was applied for selecting optimal wireless link and router of P2P Cloud-based Disaster Information Network and the danger situations of the disaster area were to be provided to the user by configuring disaster information component for providing services and building central disaster information platform managing it.     

基于空间信息技术的财产保险业防灾减损决策支持系统

本文介绍了在财产保险行业建立防灾减损决策支持系统的内容和意义，以及该系统的结构和特点，同时介绍了如何运用遥感、地理信息系统和全球定位系统等空间信息技术来实现财产保单灾害发生前损失的预测、防灾减损方案的决策以及灾后损失的评估等决策支持。