2nd ed. p. cm. Rev. ed. of Storage networks explained / Ulf Troppens. c ISBN (cloth). 1. Storage area networks (Computer networks) 2. InfiniBand, ISBN: X by centconmosazy.ga GmbH .. Storage Networks Explained provides the basic knowledge to understand the various technical. All you need to know about Storage Area Networks The amount of data of an average company doubles every centconmosazy.ga, companies who own 1TB of data today.
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Storage Networks Explained: Basics and Application of Fibre Channel SAN, NAS , Print ISBN |Online ISBN Read "Storage Networks Explained Basics and Application of Fibre Channel SAN, NAS, iSCSI, InfiniBand and FCoE" by Ulf Troppens available from Rakuten . [PDF] Storage Networks Explained Basics And Application Of Fibre Channel San Of Fibre Channel San Nas Iscsi Infiniband And Fcoe 2Ed (Pb ) book.
Explains the use of storage networks for data sharing, data protection, and digital archiving. They work at the interface between technology and customers. Their duties cover a wide field of responsibilities.
Storage Networks Explained
They develop and test new software for storage networks. They present the latest hardware and software products in the field of storage networks to customers and explain their underlying concepts. Last but not least they deploy and support respective hardware and software in customer environments. Since he has been primarily involved in the development and administration of Unix systems, storage systems, data and storage networks and distributed applications.
Rainer Erkens left studied Mathematics at the University of Mainz.
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His experience in the management of computers and distributed applications goes back to He is a software architect focussing on the software development of management applications for storage networks which support open standards such as SMI-S and IEEE Since he is working in the field of storage networks and the software development of management applications for storage networks. Free Access.
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New Password. Your password has been changed. Data is written identically to two drives, thereby producing a "mirrored set" of drives.
Thus, any read request can be serviced by any drive in the set. If a request is broadcast to every drive in the set, it can be serviced by the drive that accesses the data first depending on its seek time and rotational latency , improving performance.
Write throughput is always slower because every drive must be updated, and the slowest drive limits the write performance. The array continues to operate as long as at least one drive is functioning.
All disk spindle rotation is synchronized and data is striped such that each sequential bit is on a different drive. Hamming-code parity is calculated across corresponding bits and stored on at least one parity drive. All disk spindle rotation is synchronized and data is striped such that each sequential byte is on a different drive.
Parity is calculated across corresponding bytes and stored on a dedicated parity drive. Upon failure of a single drive, subsequent reads can be calculated from the distributed parity such that no data is lost. Double parity provides fault tolerance up to two failed drives. This makes larger RAID groups more practical, especially for high-availability systems, as large-capacity drives take longer to restore.
The elements of a RAID may be either individual drives or arrays themselves.
Arrays are rarely nested more than one level deep. If a single drive failure occurs then one of the stripes has failed, at this point it is running effectively as RAID 0 with no redundancy.
[PDF] Storage Networks Explained: Basics and Application of Fibre Channel SAN NAS iSCSI and
The array can sustain multiple drive losses so long as no mirror loses all its drives. Besides a drastic speed increase, this also provides a substantial advantage: the possibility to start a linear JBOD with a small set of disks and to be able to expand the total set with disks of different size, later on in time, disks of bigger size become available on the market.
Implementations[ edit ] The distribution of data across multiple drives can be managed either by dedicated computer hardware or by software. A software solution may be part of the operating system, part of the firmware and drivers supplied with a standard drive controller so-called "hardware-assisted software RAID" , or it may reside entirely within the hardware RAID controller.
Unlike the network interface controllers for Ethernet , which can be usually be configured and serviced entirely through the common operating system paradigms like ifconfig in Unix , without a need for any third-party tools, each manufacturer of each RAID controller usually provides their own proprietary software tooling for each operating system that they deem to support, ensuring a vendor lock-in , and contributing to reliability issues.
Software RAID can be implemented as: A layer that abstracts multiple devices, thereby providing a single virtual device e. Linux kernel 's md and OpenBSD's softraid A more generic logical volume manager provided with most server-class operating systems, e. Veritas or LVM A component of the file system e. The mirrored disks, called a "shadow set", can be in different locations to assist in disaster recovery.
The second-stage boot loader for FreeBSD is capable of loading a kernel from such an array. However, hardware RAID controllers are expensive and proprietary.
To fill this gap, inexpensive "RAID controllers" were introduced that do not contain a dedicated RAID controller chip, but simply a standard drive controller chip with proprietary firmware and drivers. During early bootup, the RAID is implemented by the firmware and, once the operating system has been more completely loaded, the drivers take over control.
Consequently, such controllers may not work when driver support is not available for the host operating system.If a request is broadcast to every drive in the set, it can be serviced by the drive that accesses the data first depending on its seek time and rotational latency , improving performance.
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[PDF] Storage Networks Explained: Basics and Application of Fibre Channel SAN, NAS, iSCSI,
Both authors work at the interface between technology and customers. But the client only portable, Gluster File system has no kernel sees a block device. Rainer Erkens left studied Mathematics at the University of Mainz.