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DAS to SAN -- iSCSI Offers a Compelling Solution

DAS to SAN -- iSCSI Offers a Compelling Solution. Presented by: Jason Blosil, NetApp and Gary Gumanow, Dell. Ethernet Storage Forum Members. The SNIA Ethernet Storage Forum (ESF) focuses on educating end-users about Ethernet-connected storage networking technologies. Compellent Dell EMC

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DAS to SAN -- iSCSI Offers a Compelling Solution

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  1. DAS to SAN -- iSCSI Offers aCompelling Solution Presented by: Jason Blosil, NetApp andGary Gumanow, Dell

  2. Ethernet Storage Forum Members The SNIA Ethernet Storage Forum (ESF) focuses on educating end-users about Ethernet-connected storage networking technologies. • Compellent • Dell • EMC • HP • Intel • Juniper Networks • Microsoft • NetApp • Panasas • Sun

  3. Webcast Presenter Jason has over 13 years of Finance and Marketing experience with manufacturing and technology firms. For the last 9 years, he has worked in product management and product marketing for companies within the data storage industry. His expertise includes server based storage and RAID, as well as external storage solutions. Jason currently works for NetApp in Product Marketing, specializing in iSCSI based solutions. Jason BlosilProduct Marketing, NetApp Gary Gumanow has over 25 years of experience in IT management, systems integration, product management, and strategic product planning. Gary is currently responsible for product marketing of Dell’s EqualLogic storage arrays. Prior to Dell he spent ten years at Intel where he brought over 20 Ethernet products to market. Gary holds two patents and has authored many papers on networking and server platform architecture. Gary GumanowProduct Line Manager, Dell

  4. Today’s Webinar • What we’ll cover today… • Describe characteristics and components of Direct Attached Storage (DAS) vs Storage Area Networks (SAN) and why iSCSI SANs are an ideal first step to greater data center efficiency through Ethernet based SANs • You are an… • IT managers looking to deploy SANs for the first time • IT managers rethinking their existing SAN infrastructure in favor of IP SAN We hope you enjoy this webinar

  5. Future Events • Two upcoming iSCSI SIG webinars: • March 3rd – Optimized Storage Environments • April 7th - Disaster Recovery/Cloud/Backup • Storage Networking World – Spring 2010 Orlando • Sign up for these tutorials when attending: • iSCSI SANs - Ideal Applications, Large and Small • iSCSI - A lossless Ethernet Fabric with DCB

  6. Agenda • Characteristics & Limitations of DAS • Characteristics & Benefits of SANs • Why iSCSI for SANs

  7. Buying Storage with DAS • Storage purchase includes server hardware with disk capacity • Capacity requirement is a guess – so is the right server • Typical use is for a single application • As capacity requirements increase, so do the number of servers “I need more storage... …I’ll buy another server.”

  8. Server Components • Motherboard • Disk drive • Network interface • RAID controller • I/O cable • Fan * • Power supply * Single Points of Failure * Commonly redundant in high-end server platforms

  9. DAS Options - JBOD • Advantages • Greater expandability / higher density storage • Redundant components at the JBOD • Possible server cluster & failover • Disadvantages • Server clustering is complicated • Server & I/O path still not redundant

  10. Tape Drive Additional Challenges with DAS • Limited capacity in server chassis • Storage inefficiency - islands • Software / firmware updates • Backup and restore • Site to site failover • Limited server virtualization capabilities VM2 VM1 VM2

  11. Vote #1 – Das usage

  12. Storage Comparison DAS NAS SAN Application Server Application Server Application Server Application Server Application Server File System File System File System RAID File System RAID RAID

  13. SAN Storage Components • Storage network adapters • SAN switch • Storage system • Redundant controllers • Redundant hot-swap power & cooling units • Expandable I/O ports • Integrated disk bays or separate disk shelf (JBOD) Controller 1 Controller 2 Passive Midplane PS1 PS2 PS3

  14. What SANs Deliver • Value of Storage Area Networks • Improved reliability and reduced cost of backup • Improved scalability of storage capacity and performance • Simplified storage provisioning • Improved data availability • Top reasons for deploying a SAN • Back-up • Storage consolidation • Server virtualization • Satisfy demands for additional capacity • Performance • Disaster recovery • New project or application deployment

  15. SAN Benefits - Reliability • Redundant components • No single point of failure • RAID and redundancy • More spindles with SAN • Redundant RAID and cables • Backup and recovery is universal • Multi-pathing (MPIO) • Fault-tolerance • Load balancing

  16. SAN Benefits - Serviceability • Modular design • Hot swap of components • Software updates are non-disruptive • Redundant data paths across network CLR 1 CLR 2 PS1 PS2 PS3

  17. SAN Benefits – Resource Mobility • Virtual Machines (VMs) stored as files • Hypervisors aware of VMs on other servers • Permit movement of VM for load balancing or server to server and site failover VM1 VM2 VM2 VM3 Hypervisor Hypervisor 3 2 1 VM Files

  18. SAN Benefits - NetBoot • Network drive appears to server as a local drive • Benefits: • No special purpose hardware • Broad OS support • Lowers server costs • Boot volumes protected • Improved performance • Simplified OS updates / management • Improved disk efficiency • Easy to scale Boot Volumes

  19. Network Boot w/ Rapid Cloning • LUN cloning reduces capacity required for common boot images • Master boot image is replicated with space efficient copies • Clones created in seconds/minutes • Benefits: • Reduced storage capacity requirements • Rapid server deployment • Rapid server scaling and redeployment Cloned Boot LUNs Master Boot LUN

  20. Tape Drive SAN Benefits – Backup and Restore • Reduce complexity and increase efficiency • Important in virtual server environments • Single point backup • Reduces network congestion to host • Snapshot and disk to disk replication SAN Storage

  21. SAN Benefits – Performance & Scalability • Service multiple applications with single storage pool • More spindles for better IOP performance • High performance networks with multiple paths • Port bonding for IP traffic – increase overall bandwidth • Easily add capacity online • Capacity allocation and resizing of LUNs in increments less than a drive

  22. Vote #2 – San obstacles

  23. Perceived Obstacles to Deploying SANs • Complexity • Difficult to setup and configure • Footprint • SANs can require more equipment • Management • Requires high touch administration • Cost • All of that redundancy comes with a price iSCSI Simplifies the Environment

  24. Tape Drive Tape Drive iSCSI SAN Reduces Complexity DAS iSCSI SAN VM2 VM2 VM1 VM2 VM1 VM2 iSCSI Storage

  25. Setup - DAS vs iSCSI SAN DAS iSCSI SAN • Install RAID Driver • Install RAID management software (optional) • Create volume • Format volume • Install iSCSI Driver • Install storage management software (optional) • Create LUN on storage • Map drive letter to storage LUN IP address • Format LUN

  26. iSCSI OS Network Boot Support

  27. iSCSI Performance Options • Software Initiator + Standard NIC • Software initiator runs on host CPU • Low cost (Free download) • May offer highest performance, but highest CPU overhead • About 85% of iSCSI deployments • TCP/IP Offload Adapter • Lower host CPU overhead • Added cost for adapter, but uses OS iSCSI initiator • iSCSI HBA • CPU overhead similar to FC adapter • Highest cost solution

  28. DAS vs SAN – Cost Compare (6TB capacity) • Storage Server - $8,000 est. (tower) / $13,000 est. (rack) • 2 Intel Xeon Processors / 8GB memory each • Redundant power supplies • RAID Controller / cables / disks • Network Adapter (4 port) • Microsoft Server 2003 / Symantec backup • JBOD - $7,000 est. • Redundant power • Disks • iSCSI Storage System - $13,000 est. • Redundant controllers & power • Disks

  29. Why IP SAN (iSCSI)? • Mature standard (2004) • Looks like a local SCSI disk • Leverages IP Expertise • Economies of scale • Scalability / Performance • Improved TCO vs DAS IP SAN

  30. Vote #3 – iSCSI usage

  31. Questions & Answers

  32. To download this Webcast after the presentation, go to http://www.snia.org/about/socialmedia/

  33. Ethernet Storage Forum Members The SNIA Ethernet Storage Forum (ESF) focuses on educating end-users about Ethernet-connected storage networking technologies. • Compellent • Dell • EMC • HP • Intel • Juniper Networks • Microsoft • NetApp • Panasas • Sun

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