提升大型网站并发访问性能Enhancing concurrent access performance of large websites文档格式.docx
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提升大型网站并发访问性能Enhancing concurrent access performance of large websites文档格式.docx
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theuseofhighperformanceserver,highperformanceandhighefficiencyofthedatabaseprogramminglanguage,andhighperformanceWebcontainer.Thesesolutions,tosomeextent,meangreaterinvestment.
1,HTMLstatic
Infact,weallknow,thehighestefficiencyandtheminimumconsumptionispurestaticHTMLpages,sowemakeourwebsitepagestaticpagetoachievethemostsimplemethodisthemosteffectivemethod.Butforalotofcontentandfrequentupdatestothesite,wecanallgoonebyonetoachievemanuallysothere,ourcommoninformationsystemCMS,aswevisitedeachportalsitenewschannel,eventheyarethroughotherchannels,informationreleasesystemtomanageandrealizetheinformationreleasesystemcanrealizethemostsimpleinformationinputcanautomaticallygeneratestaticpages,withchannelmanagement,authoritymanagement,automaticcaptureandotherfunctions,foralargesite,hasasetofefficientandmanageableCMSisessential.
Inadditiontotheportalandinformationreleasetypewebsite,forcommunitywebsiteinteractivitydemanding,asfaraspossiblestaticisanecessarymeanstoimprovetheperformanceofthecommunityinthepost,thestaticandreal-timeupdateswhenrestaticalsousealotofstrategies,likeMop'
saistheuseofsuchastrategy,soisthecommunityNetEase.
Atthesametime,HTMLstaticisalsoameansofusingsomecachepolicies.Fortheapplicationsthatfrequentlyusedatabasequeriesinthesystem,butthecontentupdatesareverysmall,wecanconsiderusingHTMLstatictoimplement.Forexample,inthepublicforumforumsetinformation,thisinformationcanbethemainstreamofthecurrentforummanagementbackgroundandstoredinthedatabase,thisinformationisactuallyalotinfrontoftheprogramcall,buttheupdatefrequencyisverysmall,canbeconsideredtobepartofthecontentsofthisbackgroundwhenthestatic,thusavoidingalargenumberofdatabaseaccessrequest.
2,thepictureserverseparation
Youknow,totheWebserver,whetheritisApacheorIISorothercontainers,thepictureistheconsumptionofresources,soitisnecessaryforustothepictureandpageseparation,whichisbasicallyalargesitewilladoptastrategy,theyareindependent,andevenalotofTaiwanimageserver.Suchanarchitecturecanreducetheserversystempressuretoprovidepageaccessrequests,andensurethatthesystemdoesnotcrashbecauseofpictureproblems.
Intheapplicationserverandimageserver,youcanconfiguredifferentoptimization,suchasApacheintheconfigurationoftheContentTypecanbeaslittleaspossibletosupport,aslittleaspossibletoensurethesystemLoadModule,higherconsumptionandefficiency.
3,databasecluster,librarytablehash
Largesiteshavecomplexapplications,theseapplicationsmustusethedatabase,sointhefaceofalargenumberofaccesstothedatabase,thebottleneckwillberevealedsoon,thenadatabasewillsoonbeunabletomeettheapplication,soweneedtousetheclusterdatabaseortablehash.
Intermsofdatabaseclustering,
Manydatabaseshavetheirownsolutions,OracleandSybasehaveaverygoodprogram,commonlyusedMySQLMaster/Slavearesimilar,youusewhatkindofDB,refertothecorrespondingsolutiontotheimplementation.
Theabovementioneddatabaseclusterduetothestructure,costandexpansionwillbetheDBtyperestrictions,soweneedtoimprovethesystemarchitecturetoconsiderfromtheapplicationpointofview,tablehashsolutioniscommonlyusedandmosteffective.
Weinstallthebusinessandapplicationorfunctionmoduleintheapplicationdatabaseseparation,differentmodulescorrespondingtodifferentdatabaseortable,thenthesmallerdatabaseforapageorhashfunctionaccordingtocertainstrategies,suchasusertable,tablehashaccordingtouserID,soitcanimprovesystemperformanceandlowcostandhasagoodscalability.
TheSohuforumistheuseofsuchaframework,thedatabaseusersettings,andseparateforumpostsandotherinformation,andthentothepost,theuserinaccordancewiththeplateandIDhashtablesinthedatabase,theendcanbesimpleinconfigurationfilescanmakethesystemwiththeincreaseofalowcostdatabaseinsupplementtheperformanceofthesystem.
4,cache
Theword"
cache"
hascomeintocontactwithtechnologyandhasbeenusedinmanyplaces.CachinginWebarchitectureandwebdevelopmentisalsoimportant.Herearethetwobasiccaches.Advancedanddistributedcachingisdescribedlater.
Thecachearchitecture,morefamiliartoApachepeoplecanknowthatApacheprovidesitsowncachemodule,theSquidmodulecanalsousetheexternalcache,thesetwomethodscaneffectivelyimprovetheresponseabilitytoaccessApache.
Webapplicationdevelopmentcache,availableontheLinuxMemoryCacheisacommonlyusedcacheinterface,canbeusedinthedevelopmentofweb,suchaswhenusingJavadevelopmentcancallMemoryCacheonsomedatacachesharingandcommunication,somelargecommunitiesusingthisarchitecture.Inaddition,intheuseofweblanguagedevelopment,allkindsoflanguageshavetheirowncachingmodulesandmethods,PHPhasPearCachemodule,Javamore,.Netisnotveryfamiliarwith,Ibelievetheremustbe.
5,mirror
Themirrorisalargesiteusedtoimprovetheperformanceanddatasecurity,mirroringtechnologycansolvedifferentnetworkaccessprovidersandareauseraccessspeeddifference,suchasthedifferencebetweenChinaNetandEduNethaspromptedalotofwebsitesintheeducationnetworkstructuresinthemirrorsite,dataupdateorupdate.Intermsofthedetailsofmirrorimages,thisisnottooelaborate,andtherearemanyprofessionalready-madesolutionarchitecturesandproductsavailable.Therearealsocheapideasthatcanbeimplementedbysoftware,suchasRsynconLinux.
6、loadbalancing
Loadbalancingwillbeahigh-endsolutionforlargewebsitesaddressinghighloadaccessandalargenumberofconcurrentrequests.
Loadbalancingtechnologyhasdevelopedformanyyears,therearemanyprofessionalserviceprovidersandproductscanchoose,Ipersonallycontactedanumberofsolutions,ofwhichtherearetwoarchitectureforyoutomakereference.
(1)hardwarefourlayerswitching;
Thefourthlayerexchangeusestheheaderinformationofthirdlayersandfourthlayersofinformationpackets,andidentifiestheserviceflowaccordingtotheapplicationinterval,andtheserviceflowofthewholeintervalsectionisallocatedtotheappropriateapplicationserverforprocessing.
ThefourthlayerexchangefunctionislikevirtualIP,pointingtothephysicalserver.Thebusinessittransmitsissubjecttoavarietyofprotocols,suchasHTTP,FTP,NFS,Telnet,orotherprotocols.Theseservicesrequirecomplexloadbalancingalgorithmsbasedonphysicalservers.IntheIPworld,thebusinesstypeisdeterminedbytheterminalTCPortheUDPportaddress,andtheapplicationintervalinthefourthlayerswitchingisdeterminedbythesourceandterminalIPaddresses,theTCPandtheUDPports.
Switchproductsinfourlayersofhardware,
Thereareanumberofwell-knownproductstochoosefrom,suchasAlteon,F5,etc.,theseproductsareexpensive,butvalueformoney,canprovideexcellentperformanceandflexibilityofmanagement."
YahooChina"
wascloseto2000servers,usingonlythreeorfoursetsofAlteon.
(2)softwarefourlayerswitching;
Asyouallknow,theprincipleofthehardwarefourlayerswitch,thefourlayerexchangeofsoftwarebasedontheOSImodelcameintobeing.Thesolutionisconsistent,buttheperformanceisslightlyworse.However,tomeetacertainamountofpressureoreaseofeffort,somepeoplesaythatthesoftwareimplementationisactuallymoreflexible,processingcapacitydependsentirelyonyourabilitytoconfigurethefamiliar.
WecanusethefourlayerexchangesoftwarecommonlyusedontheLinuxLVSLVSLinuxVirtualistosolveServer,heprovidesreal-timedisasterresponseheartbeatbasedonheartbeatscheme,improvetherobustnessofsystem,atthesametimeforthevirtualVIPconfigurationandmanagementfunctionofflexible,canmeetvariousapplicationrequirements,thedistributedthesystemisessential.
Atypicaluseofloadbalancingstrategyisbasedontheexchangeofsoftwareorhardwareofthefourlayerstructuresofthesquidclusters,thisideainmanylargewebsitesincludingsearchenginesareused,sothearchitectureofhighperformanceandlowcostandstrongexpansion,toincreaseordecreasethestructureoftheinsidenodesareveryeasy.
Forlargewebsites,eachofthemethodsmentionedearliermaybeusedatthesametime.Itiseasytointroducehere.Intheprocessofimplementation,manydetailsstillneedtobelearnedandunderstood.SometimesasmallsquidparameterorApacheparametersettin
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