The Continuing Evolution of SAN-Based Storage Infrastructures Dave Russell Research Vice President Storage Technologies & Strategies
Installed TB Growth 400% 6.5x TB per Disk Array Growth 2007 2012 The Challenge: Storage Is Consuming More of the IT Budget Storage H/W Spending Growth Storage S/W Spending Growth IT Budget Growth +7.7% +7.4% +2.5% 2012 2007
Fibre Channel SAN • High performance (2,4, 8 Gbps) • Expensive, but declining • Complex • Improving interoperability • Limited skilled personnel iSCSI SAN • Familiar network infrastructure • Broad technology knowledge • Lower host and infrastructure cost • Addresses interoperability • Driving Fibre Channel cost down SAN Infrastructure Technology Overview Benefits of SAN-Based Storage • Increased storage asset utilization • Broader host server connectivity • Centralized storage management • Better TCO
10-Gigabit Ethernet Expands iSCSI Breadth of Deployment November 2007 Gartner Data Center Conference Polling Survey Results • What is the likelihood that you will install an iSCSI SAN in the next 12 months? • 28% Very likely • 20% Likely • 52% Not likely • 19% said that 10Gbps Ethernet will affect their storage infrastructure over the next three years • What is the likelihood that you will replace your Fibre Channel SAN with 10Gbps Ethernet? • 7% Very likely • 19% Likely • 74% Not likely
Diskless Server Farm Boot From SAN: Reducing Storage Requirements, Improving Change Control High-Availability Disk Array 15K rpm HDDs • Rapid Server Recovery • Rapid Server Deployment • Streamline Administration • Reduced Acquisition Costs • Reduced Power Consumption • Reduced Cooling Consumption • Improved Reliability/Availability 10K rpm HDDs 7.2K rpm HDDs
Delayed Acquisition Use Case Increased Utilization Use Case 2.0TB 2nd Expansion 1.5TB Free Space 1.5TB Unallocated Capacity 1.5TB Unallocated Capacity Volume # 3 2.0TB 2.0TB 1st Expansion 2.5TB Reserved Unused Capacity 2.5TB Reserved Unused Capacity 1.5TB Free Space 1.5TB Reserved Unused Capacity Volume # 2 2.0TB 1.5TB Reserved Unused Capacity 1.5TB Actual Data 1.5TB Actual Data 1.0TB 500GB 1.0TB 500GB Volume 1 2TB Volume 2 3.5TB Storage System 7.0 TB Volume 1 2TB Volume 2 3.5TB Storage System 3.0-7.0 TB Fat Provisioning Fat Provisioning Thin Provisioning Thin Provisioning Thin Provisioning: Automating Storage Capacity Management, Improving Utilization
15K rpm HDDs 10K rpm HDDs Nondisruptive Bidirectional Transfers 7.2K rpm HDDs Quality of Storage Service via Automated Tiered Disk Storage • Reduced storage hardware costs • High-performance • Low-capacity disk drives • Less power, heat and space • Medium-performance • Medium-capacity • disk drives • Server and application agnostic • Low-performance • High-capacity • disk drives • Optimized price/ performance • Simplifies management
Recommendations • Automate storage management to gain agility and flexibility • Implement an iSCSI-based SAN on a dedicated Ethernet infrastructure • In an FC SAN environment, standardize infrastructure components to reduce interoperability issues • Buy an integrated and tested solution from an experienced source • Don't try to do it all at once!