Úvod
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.
Funkce
Thebiggestfeatureofthecentralizedsystemisitssimpledeploymentstructure.Atthesametime,italsohasthefollowingadvantages:dataiseasytobackup,onlythedataonthecentralcomputerneedstobebackedup;itisnoteasytobeinfectedwithviruses,aslongasthecentralcomputerisprotected,theterminalgenerallydoesnotneedexternalequipment,andtheprobabilityofinfectionisverylow;thetotalcostLow,thecentralcomputerisverypowerful,andtheterminalonlyneedssimpleandcheapequipment.
Nevýhody
Thecentralcomputerneedstoperformallthecalculations.Whentherearemanyterminals,theresponsespeedwillbeslow;inaddition,iftheterminalusershavedifferentneeds,itisnecessaryforeachuserIt’sdifficulttoconfiguretheprogramsandresourcesseparatelyonacentralizedsystem,andtheefficiencyisnothigh.
Aplikace
Bankovní systémy, bankomaty (ATM) a pokladny (POS), které se běžně používají v každodenním životě, většina z nich je centralizovaná. Systém je navíc distribuován do velkých podniků, vědeckých výzkumných jednotek, armády a vlády.
Centralizedsystems,mainlypopularinthelastcentury,havebasicallybeenreplacedbydistributedsystems.Alargepartofthosewhoarestillusingcentralizedsystemsaretocontinuetousetheoriginalsoftware,whichisoftenveryexpensive.