Linux企业集群 毕业论文外文翻译

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1、英文原文:TheLinuxEnterpriseClusterOverviewThischapterwillintroducetheclusterload-balancingsoftwarecalledIPVirtualServer（IPVS）.TheIPVSsoftwareisacollectionofkernelpatchesthatweremergedintothestockversionoftheLinuxkernelstartingwithversion2.4.23.Whencombinedwiththekernel'sr

2、outingandpacket-filteringcapabilities（discussedinChapter2）theIPVS-enabledkernelletsyouturnanycomputerrunningLinuxintoaclusterloadbalancer.Together,theIPVS-enabledclusterloadbalancerandtheclusternodesarecalledaLinuxVirtualServer（LVS）.TheLVSclusterloadbalanceracceptsall

3、incomingclientcomputerrequestsforservicesanddecideswhichclusternodeshouldreplytoeachrequest.TheloadbalancerissometimescalledanLVSDirectororsimplyaDirector.InthisbookthetermsLVSDirector,Director,andloadbalancerallrefertothesamething.ThenodesinsideanLVSclusterarecalledr

4、ealservers,andthecomputersthatconnecttotheclustertorequestitsservicesarecalledclientcomputers.Theclientcomputers,theDirector,andtherealserverscommunicatewitheachotherusingIPaddressesthesamewaycomputershavealwaysexchangedpacketsoveranetwork;however,tomakeiteasiertodisc

5、ussthisnetworkcommunication,theLVScommunityhasdevelopedanamingconventiontodescribeeachtypeofIPaddressbasedonitsroleinthenetworkconversation.SobeforeweconsiderthedifferenttypesofLVSclustersandthechoicesyouhavefordistributingyourworkloadacrosstheclusternodes（calledsched

6、ulingmethods）,let'slookatthisnamingconventionandseehowithelpsdescribetheLVScluster.LVSIPAddressNameConventionsInLVSterms,anodeofferingservicestotheoutsideworldiscalledarealserver.（Wewillusethetermsclusternodeandrealserverinterchangeablythroughoutthisbook.）TheIPaddress

7、usedontherealserveristhereforecalledarealIPaddress（RIP）.TheRIPaddressistheIPaddressthatispermanentlyassignedtotheNICthatconnectstherealservertothesamenetworkastheDirector.We'llcallthisnetworkclusternetworkortheDirector/real-servernetwork（D/RIPnetwork）.TheDirectorusest

8、heRIPaddressfornormalnetworkcommunicationwiththerealserversontheD/RIPnetwork,butonlytheDirectorneedstoknowhowtotalktothisIPa