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1、第3期张冰等:多路恢复数据流并行传输与控制方法·57·多路恢复数据流并行传输与控制方法张冰1,卢正添2,李涛2(1.国家计算机网络应急技术处理协调中心,北京100029;2.四川大学计算机学院,四川成都610065)摘要:为有效缩短灾难恢复时间,提出了一种多路恢复数据流并行传输与控制方法(MRPTC)。首先,待恢复服务器与多个备用服务器建立连接,将当前破损数据与原始的完好数据(备份数据)做差异比较,获得两者的差异数据,然后从各备用服务器处动态并行下载差异数据的不同部分,再在本地进行拼合,获得完整的数据,从而实现数据的快速恢复。该方法具有多点协同差异恢复、恢复速度快、带宽利用率高、传输网络
2、要求低等优点。理论分析和实验结果表明,该方法是快速灾难恢复的一种有效的新途径。关键词:灾难恢复;多源恢复;差异恢复;并行传输中图分类号:TP309.3文献标识码:A文章编号:1000-436X(2009)03-0054-05Multi-channelrecoverydataflowparalleltransmissionandcontrolmethodZHANGBing1,LUZheng-tian2,LITao2(1.NationalComputerNetworkEmergencyResponseTechnicalTeam/CoordinationCenterofChina,Beijin
3、g100029,China;2.ComputerSchool,SichuanUniversity,Chengdu610065,China)Abstract:Inordertoshortenthetimefordisasterrecovery,amulti-channelrecoverydataflowparalleltransmissionandcontrol(MRPTC)methodwaspresented.First,theconnectionsbetweentheservertoberecoveredandtheseveralstandbyserverswereestablishe
4、d,thedifferencecomparisonbetweenthecurrentdamageddataandtheoriginalintactdata(thebackupdata)wascompleted,thedifferenceswereobtained.Thenthedifferentpartsofthedifferencesweredynamicallydownloadedfromthestandbyserversintheparallelmode,thesepartswereunitedlocally,thewholedatawasfinallyobtained,andth
5、efastdisasterrecoveryofthedatawasachieved.Thetheoreticalanalysisandtheexperimentresultsshowthattheproposedmethodhasthefeaturesofmulti-pointcollaborativedifferencerecovery,highrecoveryspeed,fullbandwidthutilization,andlownetworkrequirement.Therefore,thismethodisanewgoodapproachoffastdisasterrecove
6、ry.收稿日期:2008-11-12;修回日期:2009-01-05基金项目:国家重点基础研究发展计划(“973”计划)基金资助项目(2007CB311100);国家高技术发展计划(“863”计划)基金资助项目(2006AA01Z435);国家自然科学基金资助项目(60873246);国家信息安全计划(“242”计划)基金资助项目(2005A04)FoundationItems:TheNationalBasicResearchProgramofChina(973Program)(2007CB311100);TheNationalHighTechnologyResearchandDevel
7、opmentProgramofChina(863Program)(2006AA01Z435);TheNationalNaturalScienceFoundationofChina(60873246);TheNationalInformationSecurityProgramofChina(242Program)(2005A04)Keywords:disasterrecovery;multi-sourcerecovery;differ