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ID:5928124
大小:77.00 KB
页数:19页
时间:2017-12-28
《Linux企业集群计算机类外文翻译@中英文翻译@外文文献翻译》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、摘自:《Linux企业集群》(TheLinuxEnterpriseCluster)英文原文:TheLinuxEnterpriseClusterOverviewThischapterwillintroducetheclusterload-balancingsoftwarecalledIPVirtualServer(IPVS).TheIPVSsoftwareisacollectionofkernelpatchesthatweremergedintothestockversionoftheLinuxkernelstartingwithversion2.4.23.Whencombinedw
2、iththekernel'sroutingandpacket-filteringcapabilities(discussedinChapter2)theIPVS-enabledkernelletsyouturnanycomputerrunningLinuxintoaclusterloadbalancer.Together,theIPVS-enabledclusterloadbalancerandtheclusternodesarecalledaLinuxVirtualServer(LVS).TheLVSclusterloadbalanceracceptsallincomingcli
3、entcomputerrequestsforservicesanddecideswhichclusternodeshouldreplytoeachrequest.TheloadbalancerissometimescalledanLVSDirectororsimplyaDirector.InthisbookthetermsLVSDirector,Director,andloadbalancerallrefertothesamething.ThenodesinsideanLVSclusterarecalledrealservers,andthecomputersthatconnect
4、totheclustertorequestitsservicesarecalledclientcomputers.Theclientcomputers,theDirector,andtherealserverscommunicatewitheachotherusingIPaddressesthesamewaycomputershavealwaysexchangedpacketsoveranetwork;however,tomakeiteasiertodiscussthisnetworkcommunication,theLVScommunityhasdevelopedanamingc
5、onventiontodescribeeachtypeofIPaddressbasedonitsroleinthenetworkconversation.SobeforeweconsiderthedifferenttypesofLVSclustersandthechoicesyouhavefordistributingyourworkloadacrosstheclusternodes(calledschedulingmethods),let'slookatthisnamingconventionandseehowithelpsdescribetheLVScluster.LVSIPA
6、ddressNameConventionsInanLVScluster,wecannotrefertonetworkaddressesassimply"IPaddresses."Instead,wemustdistinguishbetweendifferenttypesofIPaddressesbasedontherolesofthenodesinsidethecluster.HerearefourbasictypesofIPaddressesusedinacluster:VirtualIP(VIP)addressTheIPaddresstheDirectorusestooffer
7、servicestoclientcomputersRealIP(RIP)addressTheIPaddressusedontheclusternodesDirector'sIP(DIP)addressTheIPaddresstheDirectorusestoconnecttotheD/RIPnetworkClientcomputer'sIP(CIP)addressTheIPaddressassignedtoaclientcomputerthatitusesasasou
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