大型企业容灾解决方案.doc

迪思杰（北京）数码技术有限公司 xxx数据复制解决方案DSG 吕贵成 mob:13910587232 msn:airlgc@ :1643340531XXX异地数据容灾复制解决方案异地数据容灾复制解决方案迪思杰（北京）数码技术有限公司迪思杰（北京）数码技术有限公司二零零七年五月四日二零零七年五月四日迪思杰（北京）数码技术有限公司 xxx数据复制解决方案DSG 吕贵成 mob:13910587232 msn:airlgc@ :1643340532目目 录录1项目背景....................................................................................................................................4 2用户的现状和需求....................................................................................................................5 2.1现状............................................................................................................................5 2.2用户需求....................................................................................................................5 3XXX 数据复制方案设计..........................................................................................................6 3.1系统结构....................................................................................................................6 3.2软硬件配置需求........................................................................................................7 3.2.1异地容灾系统的服务器和存储要求................................................................7 3.2.2DSG REALSYNC 的配置 ................................................................................7 4解决方案功能描述....................................................................................................................8 4.1初始化同步功能和性能............................................................................................8 4.1.1初始化的原理....................................................................................................8 4.1.2dsg 初始化性能.................................................................................................9 4.2实时复制的功能和性能..........................................................................................10 4.2.1日志分析速度..................................................................................................10 4.2.2每秒钟复制的操作数......................................................................................10 4.2.3复制数据延迟..................................................................................................11 4.2.4CPU 资源占用.................................................................................................11 4.2.5源端的缓存空间..............................................................................................11 4.2.6网络需求..........................................................................................................11 4.3业务接管和回切......................................................................................................12 4.4数据一致性比较......................................................................................................12 4.4.1比较原理..........................................................................................................12 4.4.2比较性能..........................................................................................................13 4.4.3特点..................................................................................................................14 5数据复制技术的比较..............................................................................................................15 5.1与磁盘阵列复制技术相比......................................................................................16 5.2与存储卷复制技术(VERITAS)相比......................................................................17 5.3DSG RealSync 与 ORACLE DG 的比较 ...............................................................18 5.4与应用层技术相比..................................................................................................20 6解决方案的特点......................................................................................................................21 6.1业务功能实现..........................................................................................................21 6.1.1主备系统数据库处于双活状态......................................................................21 6.1.2以数据保护为中心，侧重于保护业务数据安全..........................................21 6.1.3数据损失..........................................................................................................21 6.2性能和稳定性..........................................................................................................22 6.2.1对源系统性能的影响......................................................................................22 6.2.2对网络资源的使用..........................................................................................22 6.2.3数据延迟..........................................................................................................23 6.2.4对主中心的影响..............................................................................................23 6.2.5复制环境的健壮性..........................................................................................23 6.2.6事物的完整性和可用。