Въведение
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.
Характеристика
Thebiggestfeatureofthecentralizedsystemisitssimpledeploymentstructure.Atthesametime,italsohasthefollowingadvantages:dataiseasytobackup,onlythedataonthecentralcomputerneedstobebackedup;itisnoteasytobeinfectedwithviruses,aslongasthecentralcomputerisprotected,theterminalgenerallydoesnotneedexternalequipment,andtheprobabilityofinfectionisverylow;thetotalcostLow,thecentralcomputerisverypowerful,andtheterminalonlyneedssimpleandcheapequipment.
Недостатъци
Thecentralcomputerneedstoperformallthecalculations.Whentherearemanyterminals,theresponsespeedwillbeslow;inaddition,iftheterminalusershavedifferentneeds,itisnecessaryforeachuserIt’sdifficulttoconfiguretheprogramsandresourcesseparatelyonacentralizedsystem,andtheefficiencyisnothigh.
Приложения
Банкови системи, автоматични банкомати (ATM) и касови апарати на супермаркети (POS), използвани обикновено в ежедневието, повечето от тях са рецентрализирани. Системата освен това е разпространена и в големи предприятия, научноизследователски звена, армията и правителството.
Centralizedsystems,mainlypopularinthelastcentury,havebasicallybeenreplacedbydistributedsystems.Alargepartofthosewhoarestillusingcentralizedsystemsaretocontinuetousetheoriginalsoftware,whichisoftenveryexpensive.