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STORAGE ARCHITECTURE/ MASTER): Where IP and FC Storage Fit in Your Enterprise

STORAGE ARCHITECTURE/ MASTER): Where IP and FC Storage Fit in Your Enterprise. Randy Kerns Senior Partner The Evaluator Group. Storage Connection Fibre Channel IP NAS iSCSI Planning Usage. Agenda. Fibre Channel Used in Storage Area Networks (SAN) Enterprise datacenter environments

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STORAGE ARCHITECTURE/ MASTER): Where IP and FC Storage Fit in Your Enterprise

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  1. STORAGE ARCHITECTURE/MASTER):Where IP and FC Storage Fit in Your Enterprise Randy Kerns Senior Partner The Evaluator Group

  2. Storage Connection Fibre Channel IP NAS iSCSI Planning Usage Agenda

  3. Fibre Channel Used in Storage Area Networks (SAN) Enterprise datacenter environments In SMB – primarily with packaged solution “SAN in a Box” Direct connection from servers to storage systems Used in storage systems for drive connections Storage connection

  4. Targeted at block-level I/O for high performance Heterogeneous storage and server attachment Nearly unlimited scaling of storage capacity performance (bandwidth) Centralized administration Shared resources – pooling of devices Enterprise class capabilities – RAS, capacity planning, business continuity Fibre channel

  5. Fibre channel (2)

  6. Network Attached Storage (NAS) Special purpose device to provide remote file system to other servers on the network Usually a kernel or thin server that supports NFS, CIFS, HTTP and FTP some implement standard server and call it NAS single purpose devices are called appliances Utilizes IP for connection protocol and UDP or TCP Storage connection

  7. Simplicity – easy to install and administer High Availability – many NAS devices are fault tolerant and support internal failover Scalability – most NAS devices can scale in capacity and performance up to a point (upper limit) Connectivity – utilizes standard network infrastructures (typically Ethernet) and supports multiple connections NAS

  8. NAS (2) • Access – done with NFS and CIFS • Data Sharing – a basic function of NAS for files • Cost – significant competition has driven costs down. Many offerings from wide range of vendors • Backup – beginning to see backup over SANs, but many have integrated backup devices to avoid LAN usage

  9. NAS (3)

  10. 0/0 Do you have NAS installed in: • Departments in larger companies • Enterprise Data Center • Small to mid-size business • None

  11. iSCSI – Internet SCSI Use of SCSI commands over IP Target is to provide block I/O using Ethernet infrastructure No mechanism in Ethernet/IP to allow for command-response structure of SCSI SCSI is block oriented storage interface Both an interface and a protocol Ethernet / IP has network characteristics No flow control – drops packets on congestion Packet size is limited – get smaller as contention increases iSCSI attempts to work within these constraints Storage connection

  12. iSCSI mapping over IP iSCSI TCP IP

  13. iSCSI – Encapsulation Delivery of iSCSI Protocol Data Unit (PDU) to contain state and control information for SCSI Reliable transport software information for delivery and ordering. Internet Protocol for routing through a network Physical network interface and control for Ethernet

  14. iSCSI – Encapsulation mapping

  15. iSCSI usage

  16. iSCSI usage (2)

  17. 0/0 If you plan on using iSCSI, will it be for: • An IP SAN • Connect stranded servers • Both

  18. Planning • Understand requirements • Look at performance, security, cost, availability • Understand administrative issues and needs • Look at needs in the future • Decide which solutions fit the requirements • Technology characteristics • Consider the economics • Administrative costs • Expansion costs • Device / infrastructure costs

  19. Usage • Enterprise DataCenter market • Majority of companies have deployed FC SANs • > 80% in some form • > Half of storage in storage network • Most have single switch/director vendor for specific SAN • Want to manage only one type • Many have only one storage vendor per SAN • Because that’s the way salesmen sold it • NAS Gateways are seeing deployments • Major vendors offering gateways • New challenge for storage administrators • Establishes presence for NAS in Enterprise Datacenters • Customer focus is now on storage management

  20. Usage (2) • Small to mid-size business • FC SAN is usually packaged “SAN in a box” solution • No storage professionals to implement or manage a SAN • Percentage-wise, a small amount of deployment • IP SANs are early in deployment • Typically in very cost-sensitive environments • Still storage administration to do • NAS is very successful in SMB market • Also departmental and workgroup • Fits well with requirements • Market open for many types of solutions • Large and growing market with varying requirements

  21. Summary • Choose wisely • Performance requirement – FC • Minimal administration and file I/O – choose NAS • Connect stranded server cheaply – iSCSI • Block I/O with minimal cost and not a high performance requirement – iSCSI or packaged FC solution

  22. Thank You www.evaluatorgroup.com

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