SAN基础培训文档(Legato公司)

©Copyright2000,LegatoSystems,Inc1AFoundationforUnderstandingStorageAreaNetworksSAN101SpecialthankstoourSAN101sponsorswhosesupporthelpedbringyouthiscourse:©Copyright2000,LegatoSystems,Inc217August1999ObjectivesThistrainingpreparesstudentsto:UseandunderstandbasicSANterminologyDistinguishSANfromNASandotherstoragenetworktechnologiesUnderstandwhereSANscanhelpusersthemostDescribetheconfigurationofSANsinthepoint-to-point,arbitratedloop,andswitchedfabrictopologiesCitetheperformancegainsavailablethroughuseofSANtechnologyRecognizethedistinguishingfeaturesofthemainSANproductsintoday’smarket©Copyright2000,LegatoSystems,Inc317August1999AgendaIntroductiontoSANsSANconnectivitySANcomponentsSANapplicationsBasictermsandconceptsAdvantagesofSANsSANandNAS“AFibreChannelPrimer”ProductsandfeaturesHigh-performancebackupStorageconsolidation/expansionDisasterprotection©Copyright2000,LegatoSystems,Inc417August1999WhatisaStorageAreaNetwork?AdedicatednetworkforserversandstoragesystemsSANLAN©Copyright2000,LegatoSystems,Inc5WhyGiveStorageItsOwnNetwork?AgoodLANdoesnotmakeagoodSAN!LANsusedifferentprotocols,differenttoolsLANsarephysicallyinsecureatthedesktopandpotentiallyvulnerableattheserverLANsseldomhavesparecapacityforstoragenetworkingLANsaretunedtofavorshort,“bursty”usertransmissionsvslarge,continuousdatatransfers©Copyright2000,LegatoSystems,Inc617August1999SANStorageRAID:“RedundantArrayofInexpensiveDisks”Fault-tolerantgroupingofdisksthatserverseesasasinglediskvolumeCombinationofparity-checking,mirroring,stripingSelf-contained,manageableunitofstorageJBOD:“JustaBunchofDisks”DrivesindependentlyattachedtotheI/OchannelScaleable,butrequiresservertomanagemultiplevolumesDonotprovideprotectionincaseofdrivefailure©Copyright2000,LegatoSystems,Inc717August1999SANComponentsServerswithhostbusadaptersStoragesystemsRAIDJBODTapeOpticalHubsandswitchesBridgesandextendersSANmanagementsoftware©Copyright2000,LegatoSystems,Inc817August1999PromiseofSANMassivelyextendedscalabilityGreatlyenhanceddeviceconnectivityStorageconsolidationLAN-freebackupServerless(active-fabric)backupServerclusteringHeterogeneousdatasharingDisasterrecovery-Remotemirroring©Copyright2000,LegatoSystems,Inc9ScalabilityandPerformanceStorageexpansionNoimpactonserversServerexpansionNoimpactonstorageLoadbalancingActiveparallelpathsBandwidthondemandRobusttopology©Copyright2000,LegatoSystems,Inc10HighAvailabilityMultiplelevelsofredundancyareconfigurablethroughoutdatapathMultipleaccesspathsallowfailoverclusterconfigurationsDe-couplingofstoragefromapplicationserviceallowsittobemanagedindependentlyDatavaultinganddisasterrecoveryconfigurationscanaddresslossofserviceduetositefailureFAILOVER©Copyright2000,LegatoSystems,Inc1117August1999NetworkAttachedStorage(NAS)AttacheddirectlytonetworkDedicated,multi-protocolfilerNASFileI/OFileI/O©Copyright2000,LegatoSystems,Inc12SANandNASSANRemotestorageaccessPrivatenetforstorageStorageprotocolsCentralizedmanagementNASRemotefileaccessSharesusernetNetworkprotocolsDistributedmanagementGoodforsimple,scalablefilesharingGoodforhostinglargedatabases©Copyright2000,LegatoSystems,Inc1317August1999SummaryandQuestionsSANBenefitsSANsfullyexploithigh-performance,high-connectivitynetworktechnologiesSANsexpandeasilytokeeppacewithfastgrowingstorageneedsSANsallowanyservertoaccessanydataSANshelpcentralizemanagementofstorageresourcesSANsreducetotalcostofownership©Copyright2000,LegatoSystems,Inc14SANConnectivity“AFibreChannelPrimer”©Copyright2000,LegatoSystems,Inc1517August1999FibreChannelChanneltransportidealforSANsMultipleprotocolsupportNetworkingcapabilityandfunctionalityHeterogeneousinterconnectbandwidth--availability--reliability--integrity--scalability©Copyright2000,LegatoSystems,Inc1617August1999Closed,structuredHighperformanceError-freeLargedatatransferHardwareintensiveNetworkOpen,unstructuredError-freesecondaryPeertopeerData,voice,videoSoftwareintensiveTraditionalConnectivityProcessorMemoryDiskChannel©Copyright2000,LegatoSystems,Inc1717August1999ChannelClosed,structuredHighperformanceError-freeLargedatatransferHardwareintensiveNetworkOpen,unstructuredError-freesecondaryPeertopeerData,voice,videoSoftwareintensiveFibreChannelFibreChannelConnectivity©Copyright2000,LegatoSystems,Inc1817August1999SANTopologiesPoint-to-Point100MB100MBArbitratedLoop100MBSwitchedFabric100MB100MB100MB©Copyright2000,LegatoSystems,Inc1917August1999Point-to-PointTopology100MB/sec100MB/sec©Copyright2000,LegatoSystems,Inc2017August1999ArbitratedLoopTXofeachnodeisconnectedtotheRXofthenextnodeuntilaloopisformedOperationalsequence:ArbitrateforcontroloftheloopOpenchanneltotargetTransferdataCloseMaximumbandwidth-currently100MB/secNode1Node3Node2TxTxTxRxRxRx©Copyright2000,LegatoSystems,Inc2117August1999ArbitratedLoopTopology©Copyright2000,LegatoSystems,Inc2217August1999NodeFabricSwitchedFabricMaximumnumberofnodes=16millionMaximumbandwidth=200MB/secxnodesNodes(N-ports)logintotheFabric(F-ports)InternalroutingandaddressingmanagedbyfabricE