| Description |
1 online resource (434 pages) |
| Contents |
Storage Networks Explained -- Contents -- About the Authors -- Foreword by Tom Clark -- Foreword to the German Edition by Hermann Strass -- Preface by the Authors -- List of Figures and Tables -- 1 Introduction -- 1.1 Server-Centric IT Architecture and its Limitations -- 1.2 Storage-Centric IT Architecture and its Advantages -- 1.3 Case Study: Replacing a Server with Storage Networks -- 1.4 The Structure of the Book -- PART I Technologies for Storage Networks -- 2 Intelligent Disk Subsystems -- 2.1 Architecture of Intelligent Disk Subsystems -- 2.2 Hard Disks and Internal I/O Channels -- 2.3 JBOD: Just a Bunch of Disks -- 2.4 Storage Virtualization using RAID -- 2.5 Different RAID Levels in Detail -- 2.5.1 RAID 0: block-by-block striping -- 2.5.2 RAID 1: block-by-block mirroring -- 2.5.3 RAID 0+1/RAID 10: striping and mirroring combined -- 2.5.4 RAID 4 and RAID 5: parity instead of mirroring -- 2.5.5 RAID 2 and RAID 3 -- 2.5.6 A comparison of the RAID levels -- 2.6 Caching: Acceleration of Hard Disk Access -- 2.6.1 Cache on the hard disk -- 2.6.2 Write cache in the controller of the disk subsystem -- 2.6.3 Read cache in the RAID controller -- 2.7 Intelligent Disk Subsystems -- 2.7.1 Instant copies -- 2.7.2 Remote mirroring -- 2.7.3 LUN masking -- 2.8 Availability of Disk Subsystems -- 2.9 Summary -- 3 I/O Techniques -- 3.1 The Physical I/O Path from the CPU to the Storage System -- 3.2 SCSI -- 3.2.1 SCSI basics -- 3.2.2 SCSI and storage networks -- 3.3 The Fibre Channel Protocol Stack -- 3.3.1 Links, ports and topologies -- 3.3.2 FC-0: cables, plugs and signal encoding -- 3.3.3 FC-1: 8b/10b encoding, ordered sets and link control protocol -- 3.3.4 FC-2: data transfer -- 3.3.5 FC-3: common services -- 3.3.6 Link services: login and addressing -- 3.3.7 Fabric services: name server and co -- 3.3.8 FC-4 and ULPs: application protocols |
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3.4 Fibre Channel SAN -- 3.4.1 Point-to-point topology -- 3.4.2 Fabric topology -- 3.4.3 Arbitrated loop topology -- 3.4.4 Hardware components for Fibre Channel SAN -- 3.4.5 InterSANs -- 3.4.6 Interoperability of Fibre Channel SAN -- 3.5 IP Storage -- 3.5.1 IP storage standards: iSCSI, iFCP, mFCP, FCIP and iSNS -- 3.5.2 TCP/IP and Ethernet as an I/O technology -- 3.5.3 Migration from SCSI and Fibre Channel to IP storage -- 3.6 InfiniBand -- 3.7 Virtual Interfaces and Remote Direct Memory Access (RDMA) -- 3.8 RDMA over TCP, Socket Direct Protocol (SDP) and iSCSI Extensions for RDMA (iSER) -- 3.9 Summary -- 4 File Systems and Network Attached Storage (NAS) -- 4.1 Local File Systems -- 4.1.1 File systems and databases -- 4.1.2 Journaling -- 4.1.3 Snapshots -- 4.1.4 Volume manager -- 4.2 Network File Systems and File Servers -- 4.2.1 Basic principle -- 4.2.2 Network Attached Storage (NAS) -- 4.2.3 Performance bottlenecks in file servers -- 4.2.4 Acceleration of network file systems -- 4.2.5 Case study: the Direct Access File System (DAFS) -- 4.3 Shared Disk File Systems -- 4.3.1 Case study: the General Parallel File System (GPFS) -- 4.4 Comparison: NAS, Fibre Channel SAN and iSCSI SAN -- 4.5 Summary -- 5 Storage Virtualization -- 5.1 Once Again: Virtualization in the I/O Path -- 5.2 Limitations and Requirements -- 5.2.1 Architecture-related limitations of non-virtualized storage networks -- 5.2.2 Implementation-related limitations of storage networks -- 5.2.3 Increasing complexity in the administration of large storage networks -- 5.2.4 Proposed solution: storage virtualization -- 5.3 Definition of Storage Virtualization -- 5.4 Implementation Considerations -- 5.4.1 Realization of the virtualization entity -- 5.4.2 Exchange of storage devices -- 5.4.3 Efficient use of resources by dynamic storage allocation |
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5.4.4 Efficient use of resources by data migration -- 5.4.5 Performance increase -- 5.4.6 Availability due to the introduction of redundancy -- 5.4.7 Back-up and archiving -- 5.4.8 Data sharing -- 5.4.9 Privacy protection -- 5.5 Storage Virtualization on Block or File Level -- 5.6 Storage Virtualization on Various Levels of the Storage Network -- 5.6.1 Storage virtualization in the server -- 5.6.2 Storage virtualization in storage devices -- 5.6.3 Storage virtualization in the network -- 5.7 Symmetric and Asymmetric Storage Virtualization in the Network -- 5.7.1 Symmetric storage virtualization -- 5.7.2 Asymmetric storage virtualization -- 5.8 Summary -- PART II Application and Management of Storage Networks -- 6 Application of Storage Networks -- 6.1 Definition of the Term 'Storage Network' -- 6.1.1 Layering of the transmission techniques and protocols -- 6.1.2 Networks in the I/O path -- 6.1.3 Data networks, voice networks and storage networks -- 6.2 Storage Sharing -- 6.2.1 Disk storage pooling -- 6.2.2 Dynamic tape library sharing -- 6.2.3 Data sharing -- 6.3 Availability of Data -- 6.3.1 Failure of an I/O bus -- 6.3.2 Failure of a server -- 6.3.3 Failure of a disk subsystem -- 6.3.4 Failure of virtualization in the storage network -- 6.3.5 Failure of a data centre based upon the case study 'protection of an important database' -- 6.4 Adaptability and Scalability of IT Systems -- 6.4.1 Clustering for load distribution -- 6.4.2 Web architecture -- 6.4.3 Web applications based upon the 'travel portal' case study -- 6.5 Summary -- 7 Network Back-up -- 7.1 General Conditions for Back-up -- 7.2 Network Back-up Services -- 7.3 Server Components -- 7.3.1 Job scheduler -- 7.3.2 Error handling -- 7.3.3 Metadata database -- 7.3.4 Media manager -- 7.4 Back-up Clients -- 7.5 Performance Gains as a Result of Network Back-up |
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7.6 Performance Bottlenecks of Network Back-up -- 7.6.1 Application-specific performance bottlenecks -- 7.6.2 Performance bottlenecks due to server-centric IT architecture -- 7.7 Limited Opportunities for Increasing Performance -- 7.7.1 Separate LAN for network back-up -- 7.7.2 Several back-up servers -- 7.7.3 Back-up server and application server on the same physical computer -- 7.8 Next Generation Back-up -- 7.8.1 Server-free back-up -- 7.8.2 LAN-free back-up -- 7.8.3 LAN-free back-up with shared disk file systems -- 7.8.4 Tape library sharing -- 7.8.5 Back-up using instant copies -- 7.8.6 Data protection using remote mirroring -- 7.9 Back-up of File Systems -- 7.9.1 Back-up of file servers -- 7.9.2 Back-up of file systems -- 7.9.3 Back-up of NAS servers -- 7.9.4 The Network Data Management Protocol (NDMP) -- 7.10 Back-up of Databases -- 7.10.1 Operating method of database systems -- 7.10.2 Classical back-up of databases -- 7.10.3 Next generation back-up of databases -- 7.11 Organizational Aspects of Back-up -- 7.12 Summary -- 8 Management of Storage Networks -- 8.1 System Management -- 8.2 Requirements of Management Systems -- 8.3 Support by Management Systems -- 8.4 Management Interfaces -- 8.5 Standardized and Proprietary Mechanisms -- 8.5.1 Standardized mechanisms -- 8.5.2 Proprietary mechanisms -- 8.6 In-band Management -- 8.6.1 In-band management in Fibre Channel SAN -- 8.7 Out-band Management -- 8.7.1 Use of SNMP -- 8.7.2 CIM and WBEM -- 8.7.3 Storage Management Initiative Specification (SMI-S) -- 8.7.4 CMIP and DMI -- 8.8 Operational Aspects of the Management of Storage Networks -- 8.9 Summary -- 9 Removable Media Management -- 9.1 The Significance of Removable Media -- 9.2 Removable Media -- 9.2.1 Tapes -- 9.2.2 CD, DVD and magneto-optical media -- 9.2.3 Management features of removable media -- 9.3 Libraries and Drives -- 9.3.1 Drives |
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9.3.2 Media changers -- 9.3.3 Control of the media changer -- 9.4 Problems and Requirements Related to Removable Media Management -- 9.4.1 Efficient use of the available resources -- 9.4.2 Access control -- 9.4.3 Access synchronization -- 9.4.4 Access prioritization and mount request queuing -- 9.4.5 Media tracking -- 9.4.6 Grouping, pooling -- 9.4.7 Monitoring -- 9.4.8 Reporting -- 9.4.9 Life cycle management -- 9.4.10 Vaulting -- 9.5 The IEEE 1244 Standard for Removable Media Management -- 9.5.1 Media management system architecture -- 9.5.2 The IEEE 1244 data model -- 9.5.3 Media Management Protocol (MMP) -- 9.5.4 Library and drive management protocol (LMP/DMP) -- 9.6 Summary -- 10 The SNIA Shared Storage Model -- 10.1 The Model -- 10.1.1 The functional approach -- 10.1.2 Graphical representations -- 10.1.3 An elementary overview -- 10.1.4 The components -- 10.1.5 The layers -- 10.1.6 The file/record layer -- 10.1.7 The block layer -- 10.1.8 Combination of the block and file/record layers -- 10.1.9 Access paths -- 10.1.10 Caching -- 10.1.11 Access control -- 10.1.12 Clustering -- 10.1.13 Storage, data and information -- 10.1.14 Resource and data sharing -- 10.1.15 The service subsystem -- 10.2 Examples of Disk-Based Storage Architectures -- 10.2.1 Direct attached block storage -- 10.2.2 Storage network attached block storage -- 10.2.3 Block storage aggregation in a storage device: SAN appliance -- 10.2.4 Network attached block storage with metadata server: asymmetric block services -- 10.2.5 Multi-site block storage -- 10.2.6 File server -- 10.2.7 File server controller: NAS heads -- 10.2.8 Asymmetric file services: NAS/file server metadata manager -- 10.2.9 Object-based storage device (OSD) -- 10.3 Extension of the SNIA Shared Storage Model to Tape Functions -- 10.3.1 Logical and physical structure of tapes |
| Summary |
Technologies. Contains several case studies (e.g. the example of a travel portal, protecting a critical database) Endorsed by the Storage Networking Industry Association. Written by very experienced professionals who tailored the book specifically to meet customer needs including support with supplementry material on Troppens website and Preface written by Tony Clark. Provides basic application information key for systems administrators, database administrators and managers who need to know about the networking aspects of their systems. As well as systems architects, network managers, information management directors and decision makers. This book also supports applications for graduate students and other relevant courses in the field. Awarded Best System Administration Book 2005 by the Linux Journal |
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"Storage Networks Explained has much to recommend it ... a rarity in the literature of digital data storage - a complete exposition of both the base subject matter and its applications, which at the same time offers a level of readability making it suitable as an introduction to the subject. Storage Networks Explained is also flexible. It can be read cover-to-cover, browsed, or used as a reference. I recommend Storage Networks Explained as an essential component of any active information technology library." Paul Massiglia, Technical Director, VERITAS Software Corporation Storage networks will become a basic technology like databases or local area networks. According to market research, 70% of external storage devices will be connected via storage networks in 2003. The authors have hands-on experience of network storage hardware and software, they teach customers about concrete network storage products, they understand the concepts behind storage networks, and show customers how storage networks address their business needs. Storage networks provide shared access to stored data from multiple computers and servers, thus increasing storage efficiency and availability. They permit information management functions such as backup and recovery, data mirroring, disaster recovery, and data migration to be performed quickly and efficiently, with a minimum of system overhead. This book explains how to use storage networks to fix malfunctioning business processes, covering the technologies as well as applications. A hot topic that will become increasingly important in the coming years. One of the first books to focus on using rather than building storage networks, and how to solve problems. Looking beyond technology and showing the true benefits of storage networks. Covers fibre channel SAN, Network Attached Storage, iSCSI and InfiniBand |
| Notes |
10.3.2 Differences between disk and tape |
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Publisher supplied metadata and other sources |
| Subject |
Information storage and retrieval systems.
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Storage area networks (Computer networks)
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| Form |
Electronic book
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| Author |
Erkens, Rainer.
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Mller, Wolfgang
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Mü Ller, Wolfgang
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Mueller, Wolfgang.
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Waddington, Rachael
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| ISBN |
0470861827 |
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0470861835 |
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9780470861837 |
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