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1、InternationalConferenceonComputerSystemsandTechnologies-CompSysTech’2004GlobalIdentificationofStorageObjectsinNetworkAttachedStorageIliyaGeorgiev,KirilBoyanov,IvoGeorgievAbstract:NetworkattacheddiskstorageisanindependentInternetnodeandprovidesgeographicaldistribut
2、ion,mutualidentificationandexchangeofstorageobjects.Thepaperdescribesamethodforglobalidentificationofstorageobjectsandastructureofobjectregistry.Fortheidentificationword-wideuniqueidentifiersaregeneratedbydoublehashtransformationbasedontheAdvancedEncryptionStandar
3、d(Rijndael)withnocollisions.Keywords:networkattachedstorage,globalidentificationofstorageobjects,cryptographichashingINTRODUCTIONDiskstoragearchitecturesprovidedbytheindustrytodayaredirect-attachedstorage(DAS),storageareanetworks(SAN)andnetwork-attachedstoragedevi
4、ces(NAS)[3].Direct-attachedstorageisconnecteddirectlytotheI/Obusandoffershighperformanceandminimalsecurityconcerns,buttherearelimitsonconnectivity.SANisapartofaswitchednetworkthatprovidesfastscalableinterconnectforlargenumbersofindependentcomputersandstoragedevice
5、s.BothDASandSANareblock-based.Thehostoperatingsystemisresponsibleformappingtheirdatastructures(filesanddirectories)toblocksonthediskdevices.NASprovidesfileservingallowingdatasharingacrossplatformsandapplicationservers.Theseservers(Webservers,e-commerceservers,bio-
6、informationrepositories,digitallibraries,multimediaserversandothers)havedifferentfunctionalityandinformationexchangeloadwiththestorage.Themainservice,whichNASdevicesoffertosuchservers,isgeographicallydistributedrepositoryofstorageobjects.InInternet-basedglobalcomp
7、uting,itwasobservedthattheserversareverypowerfulandfault-tolerant,butarestillvulnerabletoanunexpectedcatastrophesuchasnaturaldisasterorplannedattack.Allofthestoreddatacouldbedestroyedinstantly.Inordertomakemission-criticaldataoperationalevenafteradevastatingstrike
8、,itishighlyimperativetohavedistributedinformationandremotedisasterrecovery.ThedecentralizedanddispersednatureofNASgivesthepotentialtoberobusttofaultsori
