EECS 1012 Lecture 14: EECS 1012 Lecture 14 Notes
13 Jun 2018
School
Course
Professor
EECS 1012 Lecture 14 Notes
Introduction
File storage
• In an organization, there may be many servers, with file storage attached to each.
• In large enterprises, this approach is unwieldy.
• A user has to know on which server a desired file resides.
• The number of files in use is large.
• Synchronization of files that are stored on multiple servers is difficult and risky.
• Backup requires additional care and effort.
• Data warehousing and data mining applications are difficult because the data may be
scattered over a large number of servers.
• An alternative approach that is used by large enterprises is to store data in a storage
area network (SAN).
• The organization of a storage area network
• In a storage area network, storage devices are stored together in a separate network
that is accessible from all servers.
• A variety of different storage devices, hard disks, RAID, tape, and optical storage can all
be used.
• Any server can access any storage device, with appropriate permission, of course.
• To a server, the network appears as a storage pool, similar to those that we discussed
earlier.
• The technology of the network itself, as well as access to the network, is hidden within a
cloud.
• SAN terminology refers to this cloud as the fabric.
• A storage network can extend over large distances using wide area network technology,
allowing the use of devices at remote locations for backup.
• Clients’ access files in the usual ways
10
EECS 1012 Full Course Notes
Verified Note
10 documents
