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SAP Hardware Solutions: Servers, Storage, and Networks for mySAP.com

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SAP Hardware Solutions: Servers, Storage, and Networks for mySAP.com

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Description

  • Copyright 2001
  • Dimensions: K
  • Pages: 400
  • Edition: 1st
  • Book
  • ISBN-10: 0-13-028084-4
  • ISBN-13: 978-0-13-028084-8

  • Introduction to designing robust, rock-solid SAP hardware infrastructures!
  • Maximize scalability, availability, and value
  • Hardware sizing: review of techniques with examples

All you need to know for designing hardware solutions for mySAP.com: Maximizing performance, availability, and value!

This is the first SAP book to provide a comprehensive overview of the hardware solutions needed for your mySAP.com implementation! You'll find practical, business-oriented recommendations for maximizing performance, availability, and value, covering every relevant hardware component-servers, storage, front-ends, LAN and WAN infrastructure, backup solutions, even printers. Authored by two of HP's senior consultants specializing in enterprise SAP infrastructure design, SAP Hardware Solutions addresses all this, and more:

  • Review of sizing techniques for servers, storage, LANs, and wide area bandwidth: practical examples and scenarios
  • High availability: zero-down-time backup, remote database mirroring, clustering and other failover solutions, towards fault-tolerance, and more
  • "Best practice" storage design techniques: optimizing database disk layouts, considering SANs, and a unique approach to disk system design for performance
  • Translating business requirements into practical, cost-effective hardware solutions
  • Leveraging the cost and management benefits of server consolidation

You'll even find never-before-published guidance on architecting networks for SAP—covering everything from IP address structures to high-availability cabling infrastructures.

With SAP Hardware Solutions, your most business-critical application can be designed to deliver every ounce of reliability and performance you've paid for. You can't afford anything less!

Sample Content

Downloadable Sample Chapter

Click here for a sample chapter for this book: 0130280844.pdf

Table of Contents



Preface.


How This Book Is Organized.


Acknowledgments.


About the Authors.


1.SAP System Architecture Overview: What Is mySAP.com?

The mySAP.com World. SAP System Technology.



2. Server Platforms for mySAP.com: Server, OS, and Database Platforms.

Operating System and Database Support. OS Platforms. Database Platforms. SAP Software Support Matrix. Heterogeneous Platform Support. Server Technologies. Server (HW) Platform Vendors. Processors. Memory Architectures. System Bus Architectures. I/O Architectures. Memory Addressing. Total Cost of Ownership. Overall Project Costs. System Consolidation.



3. Sizing Systems for mySAP.com: The Science of Estimation.

The Business Processing Requirements. Sizing Process Overview. Methodology. Collecting the Data. Sizing Tools. Computing the Requirements. Other mySAP.com Business Applications. Determining the Server's Configuration. Determining the SAPS. Determining the Memory and Disk Configuration.



4. Data Storage for SAP: A Strategic Resource.

Disk and Storage Basics. Database Server Perspective. Storage System Perspective. Disk I/O Patterns: A Business Application Perspective. Disk Drive Mechanisms. Disk I/O Channels. Data Protection (Disk Availability). Basic Principles. Disk Redundancy-RAID Levels. Software RAID and File Systems. Hardware RAID. Data Replication. Scalability and Managing Growth. Sizing the Storage System. Disk Systems and Interconnectivity. The Need for Data Archiving. Disk Layout Terminology and Examples. Terminology. SAP R/3 Database Layout. Disk Layout Examples of SAP Systems.



5. High-Availability Solutions for mySAP.com: Backup, Recovery, and Failover.

High-Availability Introduction. Downtime. Costs of Downtime: Is HA Needed? Specifying Uptime. Backup and Recovery Solutions. Backup and Restore ConÞgurations. Influences on Backup and Restore Time. Failover Solutions. Vulnerable mySAP.com Components. Clustering Basics for SAP. Hardware Notes for Clustering Configurations. Microsoft Cluster Server HA Configurations. Unix Clustering HA Configurations. Database Failover. Higher Levels of SAP Availability. High Availability Review for mySAP.com. Administration Philosophy for HA.



6. PCs, NCs, and Printers: User Interfaces and Output Management.

The Front-End-Interface to the User. Windows-Based Front-Ends. Java-Based Front-Ends. Browser-Based Front-Ends. From GUI to Workplace. Printer-Hardcopy Output for mySAP.com. Spool Management. Forms Management. Output Management.



7. Network Requirements for SAP: Building the Link Between Servers and Clients.

The Influence of the Network on Performance. The Influence of the Network on Cost. Bandwidth Demand for SAP Server Communication. Bandwidth Demand for SAP Front-End Communication. Bandwidth Demand for Print Output. Bandwidth Demand for CPI-C Connections. Bandwidth Demand for RFC Data Transmission. The Influence of Network on Availability.



8. Logical Network Architectures: A Question of Protocol.

IP Networks-Mission Pathfinder. Flat versus Hierarchical Networks. IP Address Design Considerations. Host Names and Address Resolution. Naming Resolution Mechanisms. SAP Servers with Multiple Network Cards. Separate Server Network. SAP Front-Ends and DHCP. Identifying SAP Traffic.



9. Cables and Cabinets: Passive But Essential for Reliability.

Wires and Fibers. Copper Cabling. Fiber Optic Cabling. Wireless LAN Technologies. Cabling Cabinets. Installation Guidelines for Cables. Topologies. Bus Topology. Star Topology. Hierarchical Star Topology-The Structural Standard. High-Availability Cabling Topologies. Ring Topology. Meshed Topology. Cable Cluster-A High-Availability Cable Concept.



10. Local Network Solutions: SAP on the Internal Information Superhighway.

Applications Compete for Bandwidth! Bandwidth Requirements of Network Segments. Network Technologies-Lord of the Rings versus the Ether. Fast, Giga, and more Ethernet. Broadcasts-The Hidden Performance Killer. Mono-Protocol Networks. Domain Segmentation by VLANs. Automatic Broadcast Control. High Availability for Local Area Networks. Redundant Network Links? Beware of Loops! Spanning Tree. Link Aggregation. Network Clustering. Switch Meshing.



11. Wide Area Connectivity: SAP Services Beyond the Property Borders.

Which Wide Area Service Is Appropriate? Technical Characteristics of WAN Services. Cost Characteristics of WAN Services. Deploying Routers to Preserve WAN Bandwidth. Filtering, Spoofing, Proxy, and Compression. Bandwidth on Demand. Data Prioritization. Security Aspects of WAN Communication. Fault-Tolerant WAN Concepts. Hardware Redundancy. Connection Redundancy.



12, SAP Internet Integration: Secure SAP Services for E-Commerce.

Performance and Reliability Aspects. ITS Architecture. Internet Communication Manager. SAP Business Connector. DCOM Connector. Security Aspects of Internet Communication. Secure Network Infrastructure. Trusted Gateways-HP VirtualVault.

Preface

Preface

At the edge of the new millennium, we are at the intersection of new business and technology trends that together will transform the way IT infrastructures for business applications are set up. The mySAP.com initiative marks the beginning of a new era of business collaboration. At an astonishingly fast pace, the mySAP vision became a business framework reality, providing a complete portfolio of business functionality for the Internet economy. However, each ecosystem needs a solid technical foundation. This foundation has to be provided by IT infrastructures, consisting of servers, storage, and networks. The basic need for a performing, reliable, and cost-effective platform is still there, if not stronger. In a world where competition is only a mouse click away, an IT infrastructure for an interconnected ecosystem must provide:

  • High Performance: No matter how long the personal think time of a user is, he or she expects immediate response from the system whenever the <Enter> key is pressed. Users waiting for their entries to be processed are unproductive by definition, and even milliseconds add up to years when there are millions of transactions over time. Therefore, short response time is the Holy Grail of a mySAP.com IT infrastructure.
  • High Availability: SAP systems are the business engines that drive a corporation's mission-critical core business functions. In the Internet ecosystem, where the information infrastructure forms the central nervous system of an enterprise, any disruption leads to an immediate paralysis of the attached branch or organization. Therefore, high availability is mandatory for a mySAP.com infrastructure.
  • Low Total Cost of Ownership: The implementation of a mySAP.com system is a strategic business decision with serious budgetary implications. However, the ongoing operational costs of the infrastructure may be even larger than the initial purchase price. Therefore, the total cost of ownership (TCO) for a mySAP.com infrastructure has to be considered.

To satisfy these demands, a holistic approach is needed. Only a joint effort can make a mySAP.com project successful. However, the experts responsible for the different areas of IT infrastructure within an organization use different terminology and often have a quite different understanding of the requirements. Thus, managers responsible for the technical aspects of an SAP implementation have a tough job. To manage the potential chaos requires a basic understanding of the technology and terminology used for mySAP.com infrastructures. Simply investing in the latest technology solutions isn't always the right answer.

In many discussions with customers, the authors learned that there is a need for a guide to help close the understanding gap between the mySAP.com requirements and the available technologies. This book presents the various infrastructure facets involved in a mySAP.com project, going into more detail when necessary to help explain the requirements of SAP infrastructures so that even those not considered specialists could benefit. Throughout the book practical hints are provided to help focus on the important, as well as sometimes less obvious, solution and configuration choices to be made. The scope of the book, however, is limited to the technical design aspects of the IT infrastructure. Details of the installation and customizing of the SAP software itself, and the even more critical challenges of business process reengineering, are not discussed in this book.

The solutions and architecture described in this book are related to the most recent SAP releases available. In response to market demand, new hardware and software solutions are emerging from the labs at an increasing pace. However, the core software technology and architectures take longer to evolve, thus the basic server, storage, and network technology solutions presented in this book may apply to even future versions of SAP software. In addition, many of these technical solutions presented are valid for other types of client/server-based, non-SAP, enterprise software solutions.

This book was purposely written as an overview of the technical solutions needed for designing hardware infrastructure proposals. It is not intended as in implementation guide. Although this book was written generically by intention, both authors are members of the HP-SAP International Competence Center. Therefore, the opinions expressed are based primarily on experiences with the numerous Hewlett-Packard solutions developed for mySAP.com infrastructures. The HP-SAP International Competence Center, founded in 1989 and operated jointly by SAP and HP, enjoys the longest experience with SAP client/server infrastructures. HP products, proven in several thousand installations, are therefore primarily used as solution examples.

How This Book Is Organized

This book is organized in chapters. Chapter 1 sets the foundation for what mySAP.com and SAP systems are all about from an IT perspective. It provides a short review of the mySAP.com Business Applications, along with the SAP system architecture relevant for the remaining chapters.

Chapter 2 introduces the server systems used with SAP software. The focus is on the server technologies that are typically specified, with a detailed look at processor and memory designs. In addition, the aspects of consolidating multiple SAP systems on one server are presented. Chapter 3 focuses on sizing principles, which are used to determine the server's processor and memory configurations. It reviews the various sizing methodologies available, which are illustrated with simple examples.

Chapter 4 presents the hot topic of data storage, with a focus on disk system technology for SAP database servers. A unique approach to sizing disk systems for performance is presented in this chapter. It also reviews many of the advanced data management features found in enterprise storage systems.

Chapter 5 is about high availability and recovery solutions for SAP systems. The solutions presented in this chapter are focused on protecting the SAP application, database, and server and storage layers of the mySAP.com solution stack. However, because technology solutions alone do not make a system highly available, an HA administration philosophy is also presented.

Chapter 6 is about client PCs with focus on the front-end user interfaces for use with SAP. It also addresses output management and printing solutions for SAP.

Chapters 7 through 11 focus on network infrastructure solutions for SAP, including the network requirements of SAP, cabling design, LANs, and WANs. In larger organizations, the network administrators are usually NOT on the application and server/storage administration teams. However, they also must be aware of the performance and availability demands of mySAP.com solutions. This is especially important when response time and availability guarantees are made to the user's desktop.

Chapter 12 is related to connecting mySAP.com systems to the Internet. This reviews the solutions needed for the mySAP.com middleware or Internet Transaction Server.

Each chapter attempts to address the performance, availability, and total cost of ownership topics for its particular set of technology solutions. In addition, each chapter provides an introduction and a summary with bullets highlighting the major recommendations.

About the Authors

Dr. Michael Missbach is a senior consultant at the SAP-HP International Competence Center in Walldorf, Germany. He is responsible for developing mySAP.com Infrastructure solutions. He is focused on system consolidation and SAP on Linux. Michael's professional specialties include network infrastructures from the wire to the web. He has been a project manager and IT superintendent for ALCOA and, since 1990, for GE CompuNet, for which he established the network partnership with SAP. He holds a master's degree in mechanical engineering and a doctor of material science from the University of Karlsruhe, Germany. He lives with his wife and son near Walldorf, Germany. His hobbies include model railroading and Isaac Asimov.

Uwe M. Hoffmann developed training courses focused on SAP with Hewlett-Packard computer systems in the areas of sizing, servers and storage, and high-availability as a senior consultant and trainer with Hewlett-Packard Company at the SAP-HP International Competence Center in Walldorf, Germany. Prior to that he was a technical consultant and trainer with HP's Network Server Division and an alumnus of Andersen Consulting. He has since joined Loudcloud, a leading Internet infrastructure company. He holds a bachelor's degree in mechanical engineering and an MBA from Santa Clara University, California. He enjoys playing Ultimate Frisbee, biking, skiing, and reading science fiction. Thanks to being raised bilingual in Mountain View, California, he most recently got the opportunity to live with his wife and daughter in Germany.

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