Managing RAID on Linux : [fast, scalable, reliable data storage

Software (Kernel-Managed) RAID......Page 3 Hardware......Page 5 The RAID Levels: In Depth......Page 9 RAID-0 (Striping)......Page 11 Linear Mode......Page 12 RAID-1 (Mirroring)......Page 13 RAID-4......Page 15 RAID-5......Page 16 Hybrid Arrays......Page 18 Case 1: HTTP Image Server......Page 20 Case 3: Home Use (Digital Audio, Video, and Images)......Page 21 Case 5: Video on Demand......Page 22 Hot-Spares......Page 23 Hardware Considerations......Page 24 An Organizational Overview......Page 25 Motherboards and the PCI Bus......Page 27 I/O Channels......Page 28 Disk Access Protocols......Page 32 The AT Attachment (ATA) and Integrated Disk Electronics (IDE)......Page 33 SCSI......Page 35 SCSI Versus ATA......Page 37 Other Disk Access Protocols......Page 40 Choosing Hard Drives......Page 41 Cases, Cables, and Connectors......Page 44 Making Sense of It All......Page 48 Книга Managing RAID on Linux Managing RAID on LinuxКниги Linux Автор: Derek Vadala Год издания: 2002 Формат: pdf Издат.:O’Reilly Страниц: 262 Размер: 2 ISBN: 1-56592-730-3 Язык: Русский0 (голосов: 0) Оценка:Managing RAID on Linux covers everything system administrators need to know to put together a system that can support RAID. You will learn about the different types of RAID, along with associated technologies and issues, and how to choose the best RAID system for your needs. With a step-by-step, hands-on approach, the author guides you through the installation of either Linux software RAID or a hardware RAID card.Full DescriptionRedundant Array of Independent Disks (RAID) technology is becoming a standard feature of computer systems that support mission-critical services like file sharing, mail exchange, or Web servers. RAID offers two benefits to these essential systems: improved I/O performance and fail-safe data storage. Although bandwidth problems on networks are well documented, the internal data transfer bottleneck that exists at the hardware level in each system can also leave you with perplexing performance issues. RAID is a cost-effective and easy-to-manage way to alleviate this bandwidth problem by distributing the I/O load seamlessly across multiple disks and controllers. RAID also provides uninterrupted data access through disk mirroring and parity algorithms. That means systems can remain online even during a disk or controller failure. RAID is scalable, making it robust enough for large, high-traffic sites and small, critical systems. By using RAID, system administrators can combine single disks into terabytes worth of data storage. Managing RAID on Linux covers everything system administrators need to know to put together a system that can support RAID. You will learn about the different types of RAID, along with associated technologies and issues, and how to choose the best RAID system for your needs. With a step-by-step, hands-on approach, the author guides you through the installation of either Linux software RAID or a hardware RAID card. The book shows how to build an array and optionally install a high-performance file system. Contents include:An introduction to RAID and LinuxPlanning and architecture of your RAID systemBuilding a software RAIDSoftware RAID tools and referencesBuilding a hardware RAIDPerformance and tuning of your RAID systemRAID has become the low-cost solution of choice to deal with the ever-increasing demand for data storage space. Written for system administrators, power users, tech managers, and anyone who wants to learn about RAID technology, Managing RAID on Linux sidesteps the often-confusing vendor-specific approach you ll find elsewhere to give you the straight story on RAID. Even non-Linux users will find this book full of valuable material. RAID technology is becoming a standard feature of computer systems that support mission-critical services such as file sharing, mail exchange, and web servers. RAID offers two benefits to these essential systems: improved I/O performance and fail-safe data storage.By distributing the I/O load seamlessly across multiple disks and controllers, RAID is a cost-effective, scalable, and easy-to-manage way to alleviate the internal data transfer bottleneck that exists on heavily used systems. RAID also provides uninterrupted data access through disk mirroring and parity algorithms. That means systems can remain online even during a disk or controller failure. Managing RAID on Linux covers everything system administrators need to know to put together a system that can support RAID. You will learn about the different types of RAID, along with associated technologies and issues, and how to choose the best RAID system for your needs. With a step-by-step, hands-on approach, the author guides you through the installation of either Linux software RAID or a hardware RAID card. The book explains how to build an array and, optionally, install a high-performance filesys4em. RAID has become the low-cost solution of choice to deal with the ever-increasing demand for data storage space. Written for system administrators, power users, tech managers, and anyone who wants to learn about RAID technology, Managing RAID on Linux sidesteps the often-confusing vendor-specific approach you'll find elsewhere to give you the straight story on RAID. Even non-Linux users will find this book full of valuable a material. Redundant Array of Independent Disks (RAID) technology is becoming a standard feature of computer systems that support mission-critical services like file sharing, mail exchange, or Web servers. RAID offers two benefits to these essential systems: improved I/O performance and fail-safe data storage. RAID has become the low-cost solution of choice to deal with the ever-increasing demand for data storage space. Managing RAID on Linux covers everything system administrators, power users, and tech managers need to know to put together a system that can support RAID. You will learn about the different types of RAID, along with associated technologies and issues, and how to choose the best RAID system for your needs. With a step-by-step, hands-on approach, the author guides you through the installation of either Linux software RAID or a hardware RAID card. The book shows how to build an array and optionally install a high-performance file system. Managing RAID on Linux sidesteps the often-confusing vendor-specific approach you'll find elsewhere to give you the straight story on RAID. Even non-Linux users will find this book full of valuable material. Hardware or Software? 3 Software (Kernel-Managed) RAID 3 Hardware 5 The RAID Levels: In Depth 9 RAID-0 (Striping) 11 Linear Mode 12 RAID-1 (Mirroring) 13 RAID-4 15 RAID-5 16 Hybrid Arrays 18 RAID Case Studies: What Should I Choose? 20 Case 1: HTTP Image Server 20 Case 2: Usenet News 21 Case 3: Home Use (Digital Audio, Video, and Images) 21 Case 4: The Acme Motion Picture Company 22 Case 5: Video on Demand 22 Disk Failures 23 Degraded Mode 23 Hot-Spares 23 Hot-Swap 24 Hardware Considerations 24 An Organizational Overview 25 Motherboards and the PCI Bus 27 I/O Channels 28 Disk Access Protocols 32 The AT Attachment (ATA) and Integrated Disk Electronics (IDE) 33 SCSI 35 SCSI Versus ATA 37 Other Disk Access Protocols 40 Choosing Hard Drives 41 Cases, Cables, and Connectors 44 Making Sense of It All 48