Distributed Storage Networks

The worldwide market for SAN and NAS storage is anticipated to grow from US $2 billion in 1999 to over $25 billion by 2004. As business-to-business and business-to-consumer e-commerce matures, even greater demands for management of stored data will arise.

With the rapid increase in data storage requirements in the last decade, efficient management of stored data becomes a necessity for the enterprise. A recent UC-Berkeley study predicts that 150,000 terabytes of disk storage will be shipped in 2003. Most financial, insurance, healthcare, and telecommunications institutions are in the process of implementing storage networks that are distributed to some degree. For these institutions, data integrity is critical, and they will spend much time and money on planning.

One of the primary obstacles to implementing a storage network cited by enterprise IT managers is a lack of knowledge about storage networking technology and the specific issues involved in extending a Storage Area Network (SAN) or Network Attached Storage (NAS) over the Metropolitan Area Networks (MAN) or Wireless Area Networks (WAN). Distributed Storage Networks: Architecture, Protocols and Management addresses the "terminology gap" between enterprise network planners and telecommunications engineers, who must understand the transport requirements of storage networks in order to implement distributed storage networks. Jepsen comprehensively provides IT managers, planners, and telecommunications professionals with the information they need in order to choose the technologies best suited for their particular environment.

• Addresses a hot topic that will become increasingly important in the coming years
• Enables high-level managers and planners to make intelligent decisions about network needs
• Includes example network configurations providing solutions to typical user scenarios
• Fills the "terminology gap" between enterprise network managers and telecommunications engineers who must understand the transport requirements of storage networks in order to implement distributed storage area networks

A fundamental resource for all network managers, planners and network design engineers, as well as telecommunications engineers and engineering, computer science, and information technology students.

Zwischen Netzwerkplanern und Telekom-Ingenieuren, die zum Aufbau von verteilten Speichern die Transportanforderungen von Speichernetzen verstehen müssen, gibt es oft Verständigungsschwierigkeiten.

Dieses Buch will IT-Managern, Planern und Telekommunikationsfachleuten helfen, Probleme dieser Art zu bewältigen, um die Anforderungen ihres Netzes abschätzen und die am besten geeignete Technologie auswählen zu können.

Mit Beispielen für Netzwerkkonfigurationen und Lösungen für typische Benutzer-Szenarios. Foreword.

Preface.

Acknowledgements.

List of Figures.

List of Tables.

1. Introduction to Storage Networking.

1.1 Overview.

1.2 Evolution of Storage Netwroking.

1.3 Terminology.

1.4 Storage Concepts.

1.5 SAN Applications.

1.6 Summary.

2. Applications for Distributed Storage Networking.

2.1 Storage Integration.

2.2 Remote Backup/Restoral.

2.3 Disk Mirroring.

2.4 Data Migration.

2.5 Business Continuity/Disaster Recovery.

2.6 Remote Operation of Peripheral Devices.

2.7 Mainframe/Open Systems Connectivity.

2.8 Network Attached Storage (NAS).

2.9 Summary.

3. Distance Considerations for Storage Networks.

3.1 Physical Layer.

3.2 Protocol Considerations.

3.3 Caching.

3.4 Summary.

4. Architectures for Distributed Storage Networking.

4.1 Storage Networking in the Business Park.

4.2 Storage Networking in the Metro Network.

4.3 Storage Networking in the Wide Area Network.

4.4 Summary.

5. Protocols for Distributed Storage Networking.

5.1 Small Computer Systems Interface (SCSI).

5.2 Enterprise Systems Connection (ESCON).

5.3 Fiber Connection (FICON).

5.4 Fibre Channel (FC).

5.5 Gigabit Ethernet (GigE) and 10 Gigabit Ethernet (10G Ethernet).

5.6 Protocol Summary.

6. InfiniBand.

6.1 Applications.

6.2 Standards.

6.3 Network Topology.

6.4 Addressing.

6.5 Data Framing.

6.6 Physical layer.

6.7 Summary.

7. MAN/WAN Protocols for Distributed Storage Networking.

7.1 Wavelength Division Multiplexing (WDM).

7.2 Time Division Multiplexing and SONET.

7.3 Asynchronous Transfer Mode (ATM).

7.4 Generic Framing Procedure (GFP).

7.5 Summary - WAN/MAN Protocols.

8. Storage Over IP.

8.1 Overview.

8.2 Internet SCSI (iSCSI).

8.3 Fibre Channel and IP Netwroks.

8.4 Summary.

9. Storage Management Requirements.

9.1 Overview.

9.2 Standards.

9.3 The SNIA Shared Storage Model.

9.4 The SNIA Management Model.

9.5 The SNIA Prototype.

9.6 Distance Considerations for Storage management.

9.7 Summary.

10. Security Considerations.

10.1 Overview.

10.2 Physical Security.

10.3 User Login and Administration.

10.4 Management Interfaces.

10.5 Firewalls.

10.6 Encryption and IPSec.

10.7 Public Key Infrastructure and Digital Certificates.

10.8 Virtual Private Networks (VPNs).

10.9 SAN Security.

10.10 NAS Security.

10.11 Analyzing Network Architecture for Security Issues.

10.12 Summary.

11. Planning Distributed Storage Networks.

11.1 Selexting an Architecture.

11.2 Optical Fiber Planning.

11.3 Security Planning.

11.4 Outsourcing Storage.

11.5 Return on Investment (ROI).

11.6 Summary.

12. Glossary of Terms.

Bibliography.

Index.

Thomas C. Jepsen is Programming Languages Editor for IEEE IT Professional Magazine and a telecommunications industry professional who has developed a number of telecommunications-related Java applications, including graphical user interfaces and an application programming interface for Asynchronous Transfer Mode (ATM).

Did you know that as much as 50% of your storage capacity may be wasted or underutilized?

Efficient management of stored data is becoming a necessity for every enterprise. The high cost of downtime creates a need for the increased reliability provided by distributed storage systems. Thus the use of storage networks to manage access to data not only provides an increase in performance and survivability, but also generates real and immediate cost savings.

This book focuses on three primary areas: architectures for distributed storage networks, storage protocols and their inherent distance limitations, and management techniques for distributed storage networks.

Distributed Storage Networks

• describes the evolution of data processing from a computer-centric to a storage-centric model
• introduces the concept of a distributed storage-centric processing model
• explains common storage network functional components, such as fabric switches, storage directors, file managers, and gateways, and their roles in a distributed storage environment
• discusses distributed storage network applications, including storage integration, remote database synchronization, and backup/recovery functions
• provides a comparative view of Storage Area Network (SAN) and Network Attached Storage (NAS) functions and capabilities, and points out the advantages of each

One of the primary obstacles to implementing a storage network cited by enterprise IT managers is a lack of knowledge about storage networking technology and the specific issues involved in extending a SAN or NAS over the MAN or WAN. The primary goal of this book is to provide IT managers, planners, and telecommunications professionals with the information they need in order to choose the technologies best suited for their particular environment.