Introduction
Thecentralizedsystemhasalargecentralprocessingsystem.Thecentralprocessingsystemisahigh-performanceandexpandablecomputer.Alldata,calculations,andprocessingtasksareallinthecenterCompletedonthecomputersystem.Thecentralcomputerisconnectedtomultipleterminals.Theterminalsareusedforinputandoutput,withoutdataprocessingcapabilities,andalloperationsareperformedonthehost.Theremoteterminalisconnectedtothecentralcomputerthroughthenetwork,andtheinformationtheygetisthesame.
Centralizedversioncontrolsystem,theversionlibraryisstoredinthecentralserver,andwhenworking,youuseyourowncomputer,soyoumustfirstobtainthelatestversionfromthecentralserver,andthenstartWork,finishwork,andthenpushyourownworktothecentralserver.Thecentralserverislikealibrary.Ifyouwanttochangeabook,youmustfirstborrowitfromthelibrary,thengohometochangeityourself,andthenputitbackinthelibraryafteryouchangeit.
Features
Thebiggestfeatureofthecentralizedsystemisitssimpledeploymentstructure.Atthesametime,italsohasthefollowingadvantages:dataiseasytobackup,onlythedataonthecentralcomputerneedstobebackedup;itisnoteasytobeinfectedwithviruses,aslongasthecentralcomputerisprotected,theterminalgenerallydoesnotneedexternalequipment,andtheprobabilityofinfectionisverylow;thetotalcostLow,thecentralcomputerisverypowerful,andtheterminalonlyneedssimpleandcheapequipment.
Disadvantages
Thecentralcomputerneedstoperformallthecalculations.Whentherearemanyterminals,theresponsespeedwillbeslow;inaddition,iftheterminalusershavedifferentneeds,itisnecessaryforeachuserIt’sdifficulttoconfiguretheprogramsandresourcesseparatelyonacentralizedsystem,andtheefficiencyisnothigh.
Applications
Banksystems,automatictellermachines(ATM)andsupermarketcashregisters(POS)commonlyusedindailylife,mostofthemarecentralizedThesystem,inaddition,isalsodistributedinlargeenterprises,scientificresearchunits,themilitary,andthegovernment.
Centralizedsystems,mainlypopularinthelastcentury,havebasicallybeenreplacedbydistributedsystems.Alargepartofthosewhoarestillusingcentralizedsystemsaretocontinuetousetheoriginalsoftware,whichisoftenveryexpensive.