嵌入式系统4设计网络存储

嵌入式系统网络分DAS（直接连 NS网 MS移DAS：直接连接DAS缺利用率DAS中未被使用 空间 光盘塔驱动器：一般配置有1~12台驱动器，可以是只读ROM驱动器、CD-R/DVD-R刻录机、DVD-RAM驱动器光盘架：可容纳50~600片光盘，每个盘仓可容纳50片光（盘库内置2~12个盘仓），盘仓可方便光盘的存放和取用光盘塔DVD光盘库 DVD光盘库4.高性能/价格比 介质 DVD光盘库6.可以应用于WindowsNT,NetWare,Unix,HP,IBMAIX,SUNOS。8. DVD光盘库11.对环境要求RAID0：RAID0对数据进行分块，并分布到不同的磁盘上。误有最高的安全性，但不提供纠错RAID2：RAID2使用海明码进行纠错，一般用于大型机RAID3：RAID3要求磁盘同步 RAID4：RAID4不要求磁盘同步 RAID5：RAID5不要求磁盘同步，使用分布式校验。RAID5比RAID4实现更高的吞吐率，对数据进行校验，可恢复单个磁网络 区域网管理节

N

区域网 管理软

SAN组传输协应用软FC-FCFC块级SUNNTWindowsFCHPFCIP-ISCSIISCSI块级SUNNTWindowsHPIPISCSIE-以太以太网块级SUNNTWindowsHPEthernet以太网协可可复用的组件开发技管理控制可安装的管理插管理服元件管网络管资源管数据管应用管基础服网设 服务进程内进程内通进程间通设备间通SAN产品的硬StorageAreaNetwork XScale80200with80312Companion256MegabytesSDRAMand8MegabytesofFLASHROM3standard66MHZX64bitPCIDualgigabitEthernet160MB/sSCSIdriveconnector,extendablefor2160MB/sSCSIIOP310AAUwithhigh-speedRAIDcomputationenginefunctionsSAN产品的软SANManagementmanagementstoragemanagementapplicationserverstoragenodeDiskAccessSAN支持平管理节点WindowsNT应用服务器Linux节点LinuxSAN的将NetworkexistingFibreChannelandSCSIendsystemsMixoldFCSANsandnewNativeIPSANsNewNewNativeIPANativeIPFCCampusIPIPIPStorage优Accessorsharedataacrossextendeddistancesatspeedsupto10GbsLowerstaffcosts-LittleadditionalIndustry-widefamiliaritywithIPandLowerdeploymentcostsforIPImprovedMatureIPstandards&UseexistingIPSecurity 体系结 UnixLinux

IPIPDataConsolidation/DataReplication/RemoteBackup/RestoreandWebcontentStorageServiceProvidersIPToLinkFCSANExpandeddatasharing,replication,PreserveSANandLANinfrastructureandAAFCCampusFC FCIPkFCFCUseIPtolinkSCSIBuildSANswithSCSIdevicestoexpanddatasharingandreducestoragemanagementcostsUseStandardIProutersandEthernetcoreAASCSICampusSCSIIPSCSISCSI SCSIBuildNewNativeIPNetworkexistingFibreChannelandSCSIendMixoldFCSANsandnewNativeIPNewNewNativeIPANativeIPFCCampusIPiSCSI应用方式iSCSIUsingwithNAStoextendtheNAS iSCSI应用方式ExtendtheApplicationServer XScale80200with80312Companion512MegabytesDRAMand16MegabytesofFLASHDualGigabitEthernet160MB/sSCSIdriveController,extendablefor2160MB/siSCSIHardware(NotUsing P4512MegabytesGigabitEthernet160MB/sSCSIdriveController,extendablefor2160MB/sRAIDiSCSI产品特iSCSIiSCSIInitiator(forLinux,Windows,Solaris,iSCSIiSCSIManagementDiskAccessWebRaidiSCSI支持平OtherTargetLinux+Linux+

NAS

NFS,

NAS服务

客户客户

百兆、千客户应用服务 方Windows

文件级

NASFile

NAS系统结LinuxLinuxFileFileNAS体系结P4KernelRAID–DataNetwork-DataNFS, PCI…1~4Multi-Multi-

SCSIDual-Ultra

Root

NAS应用方BackboneNetworkinConnectServerandNASasNAS应用方MakeonemorenetworkofServersandNAStomakeaserverGigaGigaBit(orFastNAS应用方Layer4Layer4GigabitNAS应用方式Layer4Layer4GigabitGigabitNAS应用方式应用服务

交换

集群配GigabitGigabitDiskDiskClusterNAS产品优经济 解决方插即用的便利性与极佳的可扩平台无关集群支极具亲和力的中文网络管高度安NAS产品的硬件NASHardware(Using XScale80200with80312Companion512MegabytesDRAMand16MegabytesofFLASHROMDualGigabitEthernet160MB/sSCSIdriveController,extendablefor2160MB/sSCSIIOP310AAUwithhigh-speedRAIDcomputationenginefunctionsNAS产品的硬件NASHardware(NotUsing P4256-2048Megabytes100M/1000MEthernet160MB/sSCSIdriveController,extendablefor2160MB/sSCSIRAIDNAS产品的硬件NASHardware(NotUsing P4256-2048Megabytes100M/1000MEthernetIDEHardSoftRaid/HardRAIDNAS产品的软NASManagementFileDiskAccessWebRaidMultiLanguageOtherTargetLinux+Linux+BolangNAS产品测测试单测试时2002-6-通第计算机信息系统安全产品质监督检验中2002-11-通信息电信计量测试中2002-通国家广电计量测试中2002-通3C2003-通技术安2002-通 心2002-网络的未NAS的技术未GFS=GlobalFileIntegrationofSANand 技术比较

FC-

技术比较项

FC-可管理

服务器证

网络协网络集中置

服务器认网络集中置

数据集中配硬件连方优化方

无

件服务文件I/O

件服务块I/O

与网络服务以及服务相块I/O技术比较

FC-

ISCSI，

自，易于

自，易于

技术比较项FC-成成本低成本低成本低成本高可难易易难数据安难以备份恢易于备份/复易于备份/复易于备份/低高最很集群支否是是是投资/低很很高NAS开发简硬件部SCSIIDEHotplug液晶显示屏（liquidcrystaldisplay：LCD）用段式液晶：常见段式液晶的每字为8段组成，即8LCD矩PC机—LCD控制器通讯协PC机—LCD控制器通讯协PC机发送数据…数据数据…数据…节位位数据数据…数据果LCD硬件及驱动的功 LCD控制模块功 产生需要显示的数循环获取新的按钮软件内FTPNFSBusybox编译出一个单个的独立执行busybox，它可以根据配置，执行 的功，mv，rm，ls，此外还包括一个vi。TinyLogin：TinyLogin是一套tinyUNIX ，对BusyBox是极好的补充提供一个新的方式管理通/dev的编译内核时选中：AdvancedPowermanagementBIOSerr=err=RAID是“廉价磁盘冗余阵列”（RedundentArrayofInexpensive EmbeddedGeneralPlatformCIFSLinux内核裁基 以Linux 版本来自己CIFSAnimplementationofCIFStargetedforembeddedsystemsSmallPortableANSIOSEasyportingtootherWindowsCE™portStandardsWhyEmbedaCIFSDownloadtoUploadfromDevicesequippedwithCIFSserverappearintheWindows™NetworkNeighborhoodbrowserUnifynetworkattacheddevicesundersinglePoor-man’sNetworkAttachedGeneralSystemCIFSFileCIFS/OSCanCIFSbeimplementedonEmbeddedWhatdoesittakefromtheOStobeabletohostCIFSserver?WhatdoesittakefromtheCIFSprotocolmakeiteasytoimplementonembeddedCIFSEmbeddedEmbeddedUnderlying

EmbeddedVisualitySystem’svCIFS/vNBEmbedded–SupportsthedialectsagainstandWinNTCIFSShouldnotOSSharedFilesystem&ProcessSingle/MultipleCIFSServerArchitecturalWindowsCEProcessesinWindowsCEhaveseparatememoryspacesNetBIOSmayneedtobeusedbyotherclients,notonlySMBClientredirectionisAnotheroptionistouseinternalIPCforreceivedpacketdistributionWindowsCENetBIOSNodeNetBIOSNetBIOSNCNCNCEmbeddedSystemMemoryisatSoareallotherSchedulingpolicy(preemption)anBounded-responsetimealgorithmsaCannotassumememoryaccessfromoneexecutionentitytoanotherEmbeddedSystemProcessmodel/AddressPOSIXFileSystemDynamicMemorySomeimplementationsofmalloc()/free()maynotmeetO(1)requirementsEmbeddedCIFSSolutionsMostly-one-clientArchitectforflexibilityandCarefullytrimallprotocolrelatedinternaldataThekeyisinlimitingtheimplementationFullNTLM0.12functionalitymaybeanSelectlowestdialectthatmatchesCIFSDialect28commandsfor“PCNETWORKPROGRAM27morecommandsfor“LAMMAN4morefor5morefor“LMNTTotalof64Embeddedsystemsshouldadoptthelowestdialectthatprovidessufficientfunctionalityotherwise,paythepriceforadditionalUnless ysingleprocesssomeIPCmustbeNouniformIPConEmbeddedSolution:usetheloop-backIPinterfaceEvenifsingleprocessispossible,thismaynotbethebestchoiceintermsofusabilityExternalCIFSGeneralProblemAfilecopyfromonesystemtoanother,usingidenticalfilesystembydifferentCIFSservers,mustpreserveallfileattributesandinformationAlsodependsonthecopyoperationNotnecessarilyanembedded-systems-onlyThisshouldholdevenfornonNTLM0.12servers,tothebestpossibleProblemStatement--DefinetheOS-specificmeaningofDefinetheCIFSrepresentationofOSSpecificdataOR:GenerallydefinethetwowaymapofOStoCIFSdataCIFSOSServicesNetworkingFileSystemUserPermissions/Attributes/FileFilenamecharacterCaseLongOwnershipistheassociationoffileobjectwithMostEmbeddedOSdonotrecognizethenotionMostEmbeddedFileSystemsdonotSolution:AllowunrestrictedaccesstoauthenticatedtreeSolution:ImplementUserandOwnershipinternaltoCIFSserverFilesystemmustsupportMS-DOSlikepermissionmechanismNeedtomapnativeOSfilesystemspermissionstoMS-DOSbitsNotalwayspossibleorSolution:Solution:CIFSservercanaddpermissioninternaltoserverExample:WindowsCEFileCE

definitionisAttributes&CIFSEssentiallyexpresseseverythinginMS-DOS“language”Problem:howtomapfilesystemattributestoCIFS?Example:OS/2Problem:OtherfileinformationmaynotFilenamecharacterNativefilesystemcharactersetdoesnotnecessarilymatchesthatofcertainCIFSdialects–CIFS/LANMAN1.0ismostlyMS-DOSSolution:defineuniformtranslationAllfilenamesaresubjecttocharactersettranslationonSolution:ConverttouniversallyacceptableCIFSclientcharactersetCharactersettranslationNTLM0.12SupportsClientcharactersetisconvertedtouniversallyacceptableCIFSclientsetSpecialcharacterExample: Host*\/:?”<>|

CaseMustbeclearlyAreOS/FileSystemcaseDoestheOSpreservecasewhen