WIXLIB

NAS Solution .HTTP File ServerCurrent ientsLANs,WANs,LANs,WANs,SAN(Fiber ritical,ServersSAN(Fiber Channel)Benefits:Offloaded SAN cyclesIncreased performance throughput (service level) to end usersMinimized investment in additional ServersProvided storage poolingProvided heterogeneous file servingUsed existing infrastructure / tools / processesIsolated Web clients away from "Mission Critical" data. SECURITY IBM TotalStorage Copyright IBM Corporation 200121

NAS Solution .Server ConsolidationNellis Air Force BaseAs a senior systems engineer at Nellis Air Force Base in North Las Vegas, the IT manager of a 5000 personscivil engineering (CE) squadron is responsible for designing, building, and maintaining everything on the basefrom sewer pipes to aircraft hangers.After building a small server farm following a migration away from a minicomputer, the IT manager and his ITstaff were able to consolidate and migrate to newer technologies, because the staff was spending too much timemanaging and adding capacity to older servers."I'm trying to simplify my job in an industry that has grown leaps and bounds beyond whatever we imagined,and the hardest thing for us to do is to keep up with the technology" (IT Manager).This manager choose a NAS solution which quickly scaled to serve files among divergent groups of engineersand builders. CAD/CAM data stored on NAS devices provides detailed maps illustrating all electrical, water,sewer, and telecommunications lines on the base. Accessing files directly over the network was importantbecause different user groups with different platforms required access to the same information.For example, if an engineer uses CAD/CAM program to produce and store roadway plans on the NAS device,workers preparing to dig can access the plans without reconfiguring their client machines to access a particularserver. As a result, this IT manager shaved a considerable amount of timeoff each project."A tangible NAS benefit is that it gives the IT person all the functionality of a standard server environment, butwithout the overhead of administration". According to this IT manager, "scaling capacity was one of the mosttime-consuming administrative duties and now if I need more capacity, I don't buy another server, a buy morecapacity and plug into my network. It only takes about 10 to 15 minutes of configuration." IBM TotalStorage Copyright IBM Corporation 200122

NAS Solution .File Server ConsolidationSolutionCurrent EnvironmentNovellUNIXNASFileServerNTW2KInternet / IntranetUNIXClientsNovell WindowsClients ClientsGeneral purpose OS serving filesviaFTP, CIFS, NFS, HTTP, Netware.Internet / IntranetUNIXClientsNovell WindowsClients ClientsGeneral purpose OS serving filesviaFTP, CIFS, NFS, HTTP, Netware.Benefits:Provided continuous availability to filesHeterogeneous file sharingReduced cost for additional OS dependent serversAdded storage capacity non-disruptivelyConsolidated storage managementLowered Total Cost of Ownership IBM TotalStorage Copyright IBM Corporation 200123

NAS Solution .Storage Consolidation,Data Protection & Temp WarehousingIsdaner & Co.With 50 workstations and a flea of remote laptop users running NetWare and Windows NT, the accounting firmof ISdaner & CO. LLC, in Bala-Cynwyd, PA, was running out of space on its Windows NT server.Already taxed with a slew of projects, the firm's three-person IT staff was concerned about having enough timeto install and configure another server, and users, and manage users licenses. Isdaner chose a NAS solution inlarge part because of low administration requirements."Administration is a big issue because there's literally a hundred other projects that our IS staff are involved in.Layering in more administration while attending to other high's needs of a growing office was not something wewanted to encounter" (IT Manager).An Isdaner & Co. policy mandates that laptop users take daily snapshot copies of their data while at a client site.Their NAS device proved useful as a data repository as accountants downloaded their data. Back in the office,employees now directly accessed remotely gathered information on the network without considerable time spentconfiguring menus and custom controls. IBM TotalStorage Copyright IBM Corporation 200124

NAS Solution .Storage Consolidation &Mission Critical Data ProtectionCurrent EnvironmentStorage for Networked ClientsSolutionStorage for Networked ClientsIP NetworkIP NetworkWindows, UNIX Family, NovellClientsNASPooledClientStorageWindows, UNIX Family, NovellClientsBenefits:Pooled / centralized storageEasier & quicker to administer vs. adding storage to each workstationProtected mission critical data with backup features (disk & tape)Higher availabilityFile sharing / file synchronization IBM TotalStorage Copyright IBM Corporation 200125

Network Attached Storage SummaryNAS is a high powered File ServerNAS offers pooled storage to clients and servers on an IP networkNAS allows multiple mixed "File System" clients and servers to access,retrieve and store data on the same storage deviceWindows, UNIX, Novell, HTTP, FTP.NAS allows heterogeneous file sharing to mixed clients and serversi.e.: Windows client can access a UNIX file and visa versaNAS DOES NOT replace multi/general purpose serversNAS offers a low Total Cost of Ownership propositionOperational, Administration, IT Skills, Storage (cost per GBs to TBs) IBM TotalStorage Copyright IBM Corporation 200126

NAS Gateway Concepts IBM TotalStorage Copyright IBM Corporation 200127

NAS Gateway Architectural CharacteristicsSAN vendors are starting to introduce NAS GatewaysLANNAS Gateways offer the same benefits &characteristics of NASConnects to IP networksPerforms as a File ServerHeterogeneous file sharingData ProtectionDiagnostic CapabilitiesClustering & failover featuresFile systemCIFS/NFS/HTTPDiagnosticsNAS Gateway is a NAS Appliance with one exceptionRAID ControllerNAS Gateways supports direct attachment to FC storage orconnection to a storage devices across a SAN - NAS Gateways donot have any integrated disks for data storageManagementNetwork Layer(TCP/IP)Storage Array(SCSI or FC disks )Fibre Channel PCI PortSome NAS Gateway designs offer multipleconnectivity optionsRAID ControllerFC switches, hubs, directors, RAID controllers and disk arraysStorage Array(SCSI or FC disks )SAN IBM TotalStorage Copyright IBM Corporation 200128

NAS Gateway ConsiderationsQuestions to ask when connecting remote servers to a SAN:What are the distance considerations?FC connectivity has distance limitations (100 km or less)IP connectivity offers unlimited distance supportIs the cost of a FC PCI Adapter (per Server) and FC Switch/Hub cost effective?Cost of a FC PCI Adapter 2000 (approx.)Cost of a FC port on switch/hub/director 3000 (approx.)Redundancy paths double the connection costsMany times, FC connection costs exceed the value of the ServerEthernet connection costs are significantly lessDo you need Heterogeneous file sharing/serving?Does the environment have a mix of UNIX, NT, Novell Clients and Servers?NAS devices support heterogeneous file sharing IBM TotalStorage Copyright IBM Corporation 200129

NAS Gateway Solution ScenarioWhy purchase additional integrated NAS storage when you alreadyhave SAN storageCapitalize on your storage investment and purchase NASfunctionality without the cost of additional NAS storageFC has distance limitationsFC is costly to deploy whencompared to cost ofdepartmental or workgroupclass serversorNTIP NetworkNASGatewayMultipurpose UNIXServersMix of UNIX & NT ServersStorageAreaNetworkFC Switch or HubDiskDiskDiskDiskDisk IBM TotalStorage Copyright IBM Corporation 200130

NAS Gateway SummaryGives you the combined benefits of NAS and SANSAN scalability and performanceNAS flexibility and ease of useIncreases the reach of SAN infrastructureExtends beyond topology limitations of fibre channelProvides IP device access to SAN storageLeverages the value of SAN investmentReduces access costsAllows access to underutilized SAN storageEnables heterogeneous file serving IBM TotalStorage Copyright IBM Corporation 200131

iSCSI Concepts IBM TotalStorage Copyright IBM Corporation 200132

iSCSI IntroductioniSCSI (SCSI over IP)New and emerging technologyProvides routing of SCSI protocol over IP networksStandards BasedIETF - Internet Engineering Task isci-06.txtPrior to iSCSI there was no standardized method to transport "Block I/OFormats" over IP networksClients and Servers wanting to store data on LAN connected storagedevices (NAS) were required to transport the data in File I/O formats(CIFS, NFS.)Added additional layers of latency IBM TotalStorage Copyright IBM Corporation 200133

Facts . could iSCSI be important?iSCSI can enhance and compliment IP Storage solutionsRemember, all data, whether traversing NAS or SAN or DAS, is stored ontodisk drives in "Block I/O Formats" via SCSI commandsOnly standardized method for storing data over IP networks is in "FileSystem" formatsPrior to iSCSI standardsiSCSI reduces a layer of latencyEliminates the need for "block I/O" conversion to "File I/O" before transmission over IP network IBM TotalStorage Copyright IBM Corporation 200134

What's the Immediate Benefit of iSCSI?Data Base Management Systems (DBMS) applications are designed to run in ablock-oriented environmentThese high performance applications do not need universal access, from manyenvironments, at the file level (like NAS). They care more about block level performanceand controlDBMS applications demand direct connection to storage via Block I/O SCSI formats.Consider that DBMSs are constrained with File I/O based access to storage (like NAS)Example: If you are using SQL with NAS, the "Block I/O" needs to be converted to "File I/O", transportedover IP network, deconverted from "File I/O" into Block I/O and stored on diskThis process creates enormous latency.In order for high performance applications to interact with remote storage (connected viaa LAN), the need to reduce latency is criticaliSCSI . a step in the right direction. IBM TotalStorage Copyright IBM Corporation 200135

iSCSI SolutionsiSCSI solutions are currently available in two deliverables1. iSCSI ApplianceTotally integrated with Storage and Server combined into one entityLooks like a NAS device but does "block I/O" on IP network via iSCSIprotocols vs. "file I/O" on IP network via File System protocols2. iSCSI GatewayAccess to Storage Area Network or RAID StorageLooks like a NAS Gateway device but does "block I/O" on IP networkvia iSCSI protocols vs. "file I/O" on IP network via File SystemprotocolsiSCSI ApplianceiSCSIClientSoftware1IP NetworkiSCSITargetSoftwareiSCSI GatewayiClient (initiator) code routesSCSI commands over IP network2.iSCSI target code receives SCSIcommands from IP network2DASSCSI Protocol1.SAN IBM TotalStorage Copyright IBM Corporation 200136

iSCSI Pooled Storage ConsolidationSolutionCurrent environmentData center IPinfrastructureData center IPinfrastructureHigh- performancedatabase and transactionserversblock I/O or non-sharedenvironmentHigh- performancedatabase and transactionserversblock I/O or oled/centralized storageNon-disruptive growthCentralized storage managementUtilized existing network/IP skills IBM TotalStorage Copyright IBM Corporation 200137

Ethernet vs. Fibre Channel AlternativeCurrent OptionAlternative se applicationsblock I/ODatabase applicationsblock I/OEthernetFibre ChanneliSCSIpooledstorageStorageBenefits:Provides pooled storage to high performance database, applicationsUses existing infrastructure/tools/processesRequires fewer IT skillsRequires minimum investment IBM TotalStorage Copyright IBM Corporation 200138

Positioning iSCSI and NASIf Primary Benefactor End UsersAnd If Primary Need is Sharing FilesNASIf Primary Benefactor End UsersAnd If No Need to Share FilesiSCSIIf Primary Benefactor Server App.iSCSIIf Primary Benefactor Server App.And If Need to Share FilesNASIf FC isn't realistically an optionCombination NAS & iSCSIAppliance IBM TotalStorage Copyright IBM Corporation 200139

Credits, Acknowledgments & Disclaimers Copyright International Business Machines Corporation 2001IBM CorporationPO Box 12195Research Triangle Park NC 27709U.S.A.06-01All Rights ReservedReferences in this presentation to IBM products or services do not imply that IBM intends to make them available in allcountries in which IBM operates.All information being released represents IBM corporation's current intent, goals and/or objectives, and is subject to changeor withdrawal without notice.The performance data contained herein was obtained in a controlled environment based on the use of specific data. Actualresults that may be obtained in other operating environments may vary significantly. These values do not constitute aguarantee of performance.IBM, the IBM logo, Netfinity, Predictive Failure Analysis, and ServeRAID are trademarks of International Business MachinesCorporation in the United States, other countries or both.Tivoli is a trademark of Tivoli Systems, Inc. in the United States or other countries or both.Intel and Pentium are trademarks of Intel Corporation in the United States, or other countries, or both.Microsoft, Windows, Windows NT, and the Windows logo are trademarks of Microsoft Corporation in theUnited States, other countries, or both.UNIX is a registered trademark of The Open Group in the United States and other countries.Other company, product and service names may be trademarks or service marks of other companies. IBM TotalStorage Copyright IBM Corporation 200140

1. Network Attached Storage (NAS) Task-optimized, high performance storage appliance directly attached to IP networks, working independently of multipurpose servers providing "File Serving" services to clients and servers in a heterogeneous environment 2. Storage Area Network (SAN) High performance, dedicated storage network