Introduction
NASisdefinedasaspecialdedicateddatastorageserver,includingstoragedevices(suchasdiskarrays,CD/DVDdrives,tapedrivesorremovablestoragemedia)andEmbeddedsystemsoftwarecanprovidecross-platformfilesharingfunction.NASusuallyoccupiesitsownnodeonaLANwithouttheinterventionoftheapplicationserver,allowinguserstoaccessdataonthenetwork.Inthisconfiguration,theNAScentrallymanagesandprocessesalldataonthenetwork,removingtheloadfromtheapplicationorenterpriseserverUploadanduninstall,effectivelyreducethetotalcostofownershipandprotectuserinvestment.
NASitselfcansupportmultipleprotocols(suchasNFS,CIFS,FTP,HTTP,etc.),andcansupportvariousoperatingsystems.Throughanyworkstation,IEorNetscapebrowserscanbeusedforintuitiveandconvenientmanagementofNASdevices.
NASconnectsstoragedevicestotheexistingnetworktoprovidedataandfileservices.NASserversgenerallyconsistofstoragehardware,operatingsystems,andfilesystemsonthem.NASisdirectlyconnectedtothediskstoragearraythroughthenetwork.Themagneticarrayhasthecharacteristicsofhighcapacity,highperformance,andhighreliability.NASconnectsstoragedevicesthroughastandardnetworktopologyandcanaccesstheInternetdirectlywithoutaserver,anddoesnotrelyonageneraloperatingsystem.Instead,itadoptsasimplifiedoperatingsystemdesignedforusersanddedicatedtodatastorage.Protocol,whichmakesthemanagementandsettingoftheentiresystemrelativelysimple.
Technicalfeatures
NASsolutionsareusuallyconfiguredasafileservicedevice,whichisusedbyworkstationsorserversthroughnetworkprotocols(suchasTCP/IP)andapplications(suchasnetworkfilesystemNFS).OrCommonInternetFileSystemCIFS)forfileaccess.MostNASconnectionsaremadebetweenworkstationclientsandNASfilesharingdevices.Theseconnectionsdependonthecompany'snetworkinfrastructuretofunctionproperly.
Inordertoimprovesystemperformanceanduninterrupteduseraccess,NASusesspecializedoperatingsystemsfornetworkfileaccess.Theseoperatingsystemssupportbothstandardfileaccessandcorrespondingnetworkprotocols.Therefore,NAStechnologycanmeetspecificuserneeds.Forexample,whencertainenterprisesneedtodealwiththeproblemofrapiddatagrowth,ortosolvethesystemlimitationscausedbymutuallyindependentworkingenvironments,theycanadoptanewgenerationofNAStechnologyandusecentralizednetworkfileaccessmechanismsandsharingtosolvetheseproblems.,Soastoachievethepurposeofreducingsystemmanagementcostsandimprovingdatabackupandrecoveryfunctions.
Jobclassification
Electricalserver
Theelectricalserveristhelowest-endproductintheNASseries.Theelectricalserverisnotadedicatedadditionalstoragedevice.Theyprovideastoragelocationforthenetwork,butbecausetherearenoredundantandhigh-performancecomponents,theyarerelativelycheap.Inaworkgroupenvironment,appliance-typeservershavemanyfunctions.Typicalservicesincludenetworkaddresstranslation(NAT),proxy,DHCP,email,webserver,DNS,firewall,andVPN.
WorkgroupNAS
Workgroup-levelNASisparticularlysuitableforsmallandmedium-sizedcompanieswithrelativelylowstoragerequirements.TheirstorageneedsgenerallyrangefromafewhundredGBto1TB.Companiesrunninge-commercesoftwareorlargedatabaseswillneedseveralterabytesofstoragespace,andtheyusemedium-sizedNAS.Generallyspeaking,whenupgradingfromaworkgrouptoamedium-sizedNAS,youwillfindhot-swappabledrivesandsomedeviceboxesthatcanplaceadditionaldrivesormorefailurerecoveryproducts,enhancedmanagementfunctions,andaslightincreaseinsystemcomplexity.
Medium-sizedNAS
Themedium-sizedNASsolutionwecallprovidesbetterscalabilityandreliability,andhassimilaradvantagestolow-endNAS,suchasconvenienceanddedicatedStoragespaceandsimpleinstallationandmanagementprocess.Comparedwithappliance-typeserversandworkgroup-levelNAS,thecostoftheseNASdevicesissignificantlyhigher.
Large-scaleNAS
Forthistypeofstoragedevice,thesystem'seasyscalability,highavailabilityandredundancyareallcritical.Thesedevicesmustalsoprovidetheperformanceofhigh-endservers,flexiblemanagement,andtheabilitytointeractwithheterogeneousnetworkplatforms.
Advantagesanddisadvantages
Advantages
TheadvantagesofNASdatastorageareasfollows:
(1)NASissuitableforthosewhoneedtopassThenetworktransmitsfiledatatousersonmultipleclientcomputers.NASdevicescanplayagoodroleinenvironmentswheredatamustbetransmittedoverlongdistances.
(2)NASequipmentisveryeasytodeploy.NAShosts,clients,andotherdevicescanbewidelydistributedinthenetworkenvironmentoftheentireenterprise.NAScanprovidereliablefile-leveldataintegrationbecausefilelockingishandledbythedeviceitself.
(3)NASisusedinefficientfilesharingtasks.DifferenthostsandclientsaccessdataontheNASthroughfilesharingagreementstoachievefilesharingfunctions,suchasNFSinUnixandWindowsntInCIFS,thenetwork-basedfile-levellockingprovidesadvancedconcurrentaccessprotectionfunctions.
Limitations
(1)TheNASdeviceandtheclientareconnectedthroughthecorporatenetwork,sothenetworkbandwidthwillbeoccupiedduringdatabackuporstorage.Thiswillinevitablyaffectothernetworkapplicationsontheenterprise'sinternalnetwork;sharingnetworkbandwidthhasbecomeamajorproblemthatlimitsNASperformance.Therefore,thedatatransmissionrateoftheNASsystemisnothigh,andtheGigabitEthernetcanonlyreach30~50MB/s.
(2)ThescalabilityofNASislimitedbythesizeofthedevice.ItisveryeasytoaddanotherNASdevice,butitisnoteasytoseamlesslymergethestoragespaceoftwoNASdevices,becauseNASdevicesusuallyhaveuniquenetworkidentifiersandtheexpansionofstoragespaceislimited.Itcanonlyprovidefilestoragespaceandcannotfullymeettherequirementsofdatabaseapplications.
(3)NASaccessrequiresfilesystemformatconversion,soaccessisatthefilelevel.NotsuitableforBlock-levelapplications,especiallydatabasesystemsthatrequiretheuseofbareequipment.
(4)Earlyinstallationandequipmentcostsarehigh.
Mainapplications
OfficeautomationNASsolution
Officeautomationsystem(OA)isthefocusoftheinformatizationconstructionofgovernmentagenciesandenterprises.Themanagementandoperationofmodernenterprisesandinstitutionsareinseparablefromcomputersandlocalareanetworks.Whenenterprisesusethenetworkfordailyofficemanagementandoperation,theywillgeneratedailyofficedocuments,drawings,ERPandothercorporatebusinessdataandmanypersonaldocuments..ThereisgenerallynofileserverinthetraditionalinternalLAN.Theabove-mentioneddataisgenerallystoredontheemployee'scomputerandserver,andthereisnosuitabledeviceasitsbackupandstorageapplication.Becausethesecuritylevelofpersonalcomputersisverylow,employees'securityawarenessisuneven,andimportantinformationiseasilystolen,maliciouslydamagedorlostduetoharddiskfailure.
Fromtheanalysisofthedatastorageofenterprisesandinstitutions,itcanbeseenthatinorderfortheinternaldataoftheentireenterpriseandinstitutiontobemanagedandsafelyapplied,theremustbeasafe,cost-effective,convenientapplication,Managesimplephysicalmediatostoreandbackupdatawithintheenterprise.TheNASnetworkstorageserverisaspeciallydesignedfilestorageandbackupserver.Itcanmanagethedatainthenetworkreasonably,effectivelyandsafely,andcanbeusedasabackupdevicetoautomaticallybackupthedatabaseandotherapplicationdatatotheNASfromtimetotimesuperior.
TaxNASsolution
Whatthetaxindustryneedsisacomprehensivesystemthatintegratesbusiness,information,anddecisionsupport.Industrybusinesssystemsaremainlytaxcollectionandmanagementinformationsystems,aswellastaxbusinessinformationandgeneralbusinessinformation.Theentiresystemcombinesadministrativeofficeinformation,auxiliarydecision-makinginformationandbusinesssystemstoformageneralintegratedsystemplatform,thusformingacomplete,integratedandintegratedtaxbusinessmanagementsystem.
Businessdata,dailyofficedocuments,anddatamailsystemsinthetaxindustryareveryimportant.Oncethedataislost,itwillbringtroublestodailyworkandtaxationworkintheentireregion.Ensuringthesafeoperationandapplicationoftheentiredatahasbecomeapracticalproblemthatmustbesolvedinthetaxindustry.Thesolutiontothisproblemistostoreorbackupthesedatainasafe,fast,andconvenientapplicationenvironmenttoensurethesafeoperationoftaxindustrydata.
Inordertoreasonablysolvetheproblemofdatabusinessdatabackupandstorage,aNASnetworkstorageservercanbeusedtostoreandbackupbusinessdataanddailyofficedata.Inthebusinesshost,theinformationinthedatabaseisdirectlybackeduptotheNASthroughthedataincrementalbackupfunction.Togetherwiththebusinessdatainthelocalareanetworkandthestaff'sdailyofficedocumentsorCD-baseddata,theycanbestoredontheNASserversothatthestaffcanuseandbrowsethesedataatanytime.AfterusingNAS,administratorscaneffectivelyandreasonablyarrangeandmanagetheirinternaldatafiles,separatedatafilesfromothernetworkmachines,realizethedecentralizedstorageofdatafiles,andunifythemanagementofthedatadataenvironmentsystem.
AdvertisingNASsolution
Theadvertisingdesignindustryisacomprehensiveserviceindustrythatintegratesmarketresearch,marketingstrategy,creativeproduction,designexecution,post-productionandmediarelease.
Thedatastoragemodelofmanyadvertisingcompaniesisrelativelybackward,withhighcostandlowefficiency.Themainproblemispoordatasecurity;theoveralldatavolumeislargeandtheoriginallargeamountofobsoletedataisdifficulttostoreandmanage;therearemultipleoperatingsystemsThecomplicatedplatformandequipmentmakeitdifficulttoshareandmanagestoreddata,resultingininefficiency;theresignationofadvertisingdesignerscausesinnocentlossofdesignmaterials.AdoptNAStostoreandbackupthebusinessdataintheadvertisingdesignindustrynetworktorealizethecentralizedstorage,backup,analysisandsharingofdata.Accordingtothedifferentrequirementsofthedesignandresearchunitfordifferentdata,makefulluseoftheexistingdatatoreasonablyconstructtheadvertisingdesignindustry.Thedatastorageplatformimprovesthetransmissionspeedofinformationmaterials,savestime,andimprovesworkefficiency.
EducationalNASsolution
Sincethe“School-SchoolConnect”projectwasproposed,eachschoolisactivelybuildingitsowncampusnetworksothatitcanadapttothedevelopmentoftheinformationageintime.Withthegradualimplementationofthe"School-SchoolLink"project,"ResourceLink"hasbecomethefocusofthenextstepofinformatizationconstruction,whichisembodiedinthefactthatschoolsneedalotofresourceinformationtomeettheneedsofstudentsandteachers.Withthecontinuousincreaseofdataresourcesoncampus,thephysicalmediaforstoringdataneedstohavelarge-capacitystoragespaceandsecurity,andhaveaveryfasttransmissionratetoensurethesafetyandrapidaccessoftheentiredata.
Intheprocessofcampusnetworkconstruction,theemphasisisontheconstructionofthenetworksystem.Thenetworkisequippedwithalargenumberofadvancedequipment,buttheteachingapplicationresourcesonthenetworkarerelativelyscarce.Theoriginalstoragemodelwillshowmanydrawbackswhenincreasingteachingresources:Becausealleducationalresourcesintheschool’straditionalnetworkapplicationsarestoredonaserver,thecostofaserverwithhighperformanceandhighscalabilityishigher;accesstoteachingresourcesServiceswillcompetewithapplicationservicesforsystemresources,resultinginasignificantdropinsystemserviceefficiency;systemfailuresofapplicationserverswilldirectlyaffectthesecurityandavailabilityofresourcedata,andbringinconveniencetoschoolteaching.
Inresponsetotheseproblems,NASdevicescanbeintroducedtoachievecentralizedstorageandbackup.
(1)NASprovidesanefficientandlow-costresourceapplicationsystem.SincetheNASitselfisanindependentnetworkserver,itcanbeflexiblyarrangedonanynetworksegmentofthecampusnetwork,whichimprovestheefficiencyandsecurityofresourceinformationservices,andhasgoodscalabilityandlowcost.
(2)Provideflexiblepersonaldiskspaceservices.NAScancreateapersonaldiskspaceforeachstudentuser,whichisconvenientforteachersandstudentstofindandmodifythedatatheycreated.
(3)Provideanenvironmentforonlinedatabackup.NASsupportsexternaltapedrives,whichcaneffectivelytransferdatafromtheservertotheexternaltapedrives,ensuringdatasecurityandfastbackup.
(4)Effectivelyprotectresourcedata.TheNAShasanautomaticlogfunction,whichcanautomaticallyrecordtheaccessinformationofallusers.Theembeddedoperationmanagementsystemcanensurethatthesystemnevercrashestoensurecontinuousresourceservicesandeffectivelyprotectthesecurityofresourcedata.
MedicaldatastorageNASsolution
Asamedicalserviceorganizationinthesociety,themanagementofpatientcasefilesisveryimportantforhospitals.FilmsbasedonCTandX-raysmustbeconvertedintodigitalinformationbyafilmdigitizerandstoredforeasyretrievalinthefuture.Theamountofdatainthesefilmsisverylargeandveryimportant.Thesafestorageofthesefilms,quickaccesstomanagementdataandinformation,andeffectiveuseareimportantfactorstoimproveworkefficiency,anditisalsoakeyissueinhospitalinformationconstruction.Accordingtothesurvey,ahospital’smonthlydatavolumeiscloseto500GB.Computerstoragealoneisnotsufficientforsuchalargeamountofdata.Somehospitalswillusearecordertoburnpastdatapicturestoopticaldiscsforstorage.Thestoragesolutionistime-consumingandinefficient.Hospitalsneedaphysicalmediumwithlargecapacity,highsecurity,convenientmanagement,andquickdataquerytostoreandmanagethesedatasafelyandeffectively.TheNASsolutioncanstoreandmanagethesedigitalpicturesintheradiologydepartmentofthehospitalsafely,conveniently,andeffectively,therebyshorteningthetimefordatastorageandsearching,andimprovingworkefficiency.
ManufacturingNASsolution
Forthemanufacturingindustry,variousmarketdata,customerdata,transactionhistorydata,andsocialcomprehensivedataareallvitalassetsofthecompany.Thelifebloodofbusinessoperations.Onthebasisofthedigitizationofenterprisedata,protectingthekeydataoftheenterpriseandusingitrationallyhasbecomeakeyfactorforthesuccessoftheenterprise.Therefore,centralizedstorage,management,andbackupofvariousdatainthemanufacturingindustry,accordingtothedifferentrequirementsoftheenterprisefordifferentdata,soastobuildareasonableenterprisedatastorageplatform.TheNASstoragemethodismoresuitable,whichcanrealizecentralizedstorage,backup,analysisandsharingofdata,andmakefulluseofexistingdataonthisbasistomeetmarketneedsandimproveitscompetitiveness.
Tosumup,intermsofdatamanagement,NAShasgreatadvantages,whichcanbemorefullyreflectedincertainnetworkenvironmentswithfasterdataexpansion,higherdatasecurityrequirements,andheterogeneousplatformapplications.Itsvalue.Inaddition,NAShasanextremelyhighcost-performanceratio,andiswidelysuitableforvariousapplicationenvironmentsfromsmallandmedium-sizedenterprisestolargeandmedium-sizedenterprises.
ComparisonbetweenSANandNAS
NASisthecontinuationofthetraditionalnetworkfileservertechnology.Itisadedicatednetworkfileserverandisanewtechnologyandnewproductthatreplacesthetraditionalnetworkfileservermarket..Thenetworkfileservertechnologyisbasedonthematuredevelopmentofnetworktechnology.Therefore,itsaccessprotocolisthegeneralTCP/IP,andtoday'sNASproductsarealsobasedontheTCP/IPprotocolfileaccessmechanism.Traditionalnetworkfileserverscanbegenerallydividedintotwocategories:thefirstcategoryisUNIXnetworkfileservers,whichsupportNFSservers;thesecondcategoryisNTnetworkfileservers,whichsupportCIFSservers.Thestartingpointofthenetworkfileserverisdatasharingandprotection,buttheabovetwotypesofnetworkfileserversaremoredifficulttoshare;anetworkfileserversystemsupportslimitednetworkaccesscapabilities,sowhenanetworkfileservercannotmeettheperformancerequirements,itmustbeNewnetworkfileserversareadded,buttoomanynetworkfileserverscausemanagementandmaintenancedifficultiesandwasteofresources;atthesametime,traditionalnetworkfileservershaveverylimiteddataprotectioncapabilities(generally,asinglehostisconnectedtostoragemediatoformanetworkfileserver.Pointfailure),lossofdataishardtoavoid.
SANandNASaresuitablefordifferentapplications.SANisthecontinuationofthetraditionalDAStechnology,anditisanetworkstoragetechnologysuitableforalargenumberofdatablockaccessmethods,thatis,informationismainlystoredandmanagedinablockmode.ThecoreofSANtechnologyistheSANswitch,whichisthebridgebetweenthestoragesystemandthehostsystem.AlthoughtheSANswitchisalsoequippedwithCPUandCACHE,andcanalsohaveintelligentsoftwaresuchasself-managementandself-configuration,itsmainfunctionisstillasadataexchangechannel.SANtechnologyhasbeenverymatureafterseveralyearsofdevelopment.SANtechnologyabsorbstheadvantagesoftraditionalchanneltechnologyandtraditionalnetworktechnology,soithasfeaturessuchashighspeed,lowlatency,highdataconsistency,bigdatatransmission,routingmanagement,extensiveconnectivity,andlongdistanceSupport,flexiblemanagementandotheradvantages.