Download Storage Area Networking Essentials: A Complete Guide to by Richard Barker PDF

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By Richard Barker

The inside of scoop on a modern info garage technology

The quick progress of e-commerce and the necessity to have every kind of purposes working at best pace while, all on a 24/7 foundation whereas attached to the web, is overwhelming conventional facts garage tools. the answer? garage quarter Networks (SANs)--the facts communications know-how that is anticipated to revolutionize disbursed computing. Written by means of best know-how specialists at VERITAS software program international company, this publication takes readers via all points of garage networking, explaining how a SAN can assist consolidate traditional server garage onto networks, the way it makes purposes hugely on hand irrespective of how a lot facts is being kept, and the way this in flip makes information entry and administration quicker and more straightforward. approach and community managers contemplating garage networking for his or her organisations, in addition to software builders and IT employees, will locate worthy suggestion at the layout and deployment of the know-how and the way it really works. targeted, up to date insurance includes:

  • The evolution of the know-how and what's anticipated from SANs
  • Killer functions for SANs
  • Full assurance of garage networking and what it capability for the enterprise's info processing architecture
  • Individual chapters dedicated to the garage, community, and software program parts of garage networking
  • Issues for implementation and adoption

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Moreover, a distributed system needs to remember which virtual disks have been allocated to (are owned by) which servers, even when one or more of the servers is shut down and rebooted. Again, it’s software to the rescue. Some SAN infrastructure implementations help by subdividing a SAN into disjoint zones, and some RAID subsystems allow virtual disks to be reserved as the private property of a single computer (masked from other servers). It takes management software to exploit all these features, or to simulate them in SAN implementations whose components don’t offer the features.

Some SAN infrastructure implementations help by subdividing a SAN into disjoint zones, and some RAID subsystems allow virtual disks to be reserved as the private property of a single computer (masked from other servers). It takes management software to exploit all these features, or to simulate them in SAN implementations whose components don’t offer the features. Effective management of the storage and I/O resources composing a SAN is covered in more detail in Chapter 12. Application Failover Since SANs connect all of an organization’s storage devices to all of its servers, it should be possible to create highly available computing environments, in which a substitute computer can take over from a failing one, restart its applications, and resume processing its data.

2 are physically connected to all of the storage devices. If Server F needs data that was produced by Server E, there’s no need to copy it, because Server F can access the devices on which Server E stored the data. All that’s required is a logical change of storage device ownership from Server E to Server F or, better yet, an agreement by Server E to stay out of the way while Server F is actively using the data. Universal storage connectivity has some pretty powerful implications for information services departments: ■ There’s no need to devise and schedule data transfers between pairs of servers.

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