December 2004
Beginner
480 pages
11h 54m
English
book
Storage Networking Fundamentals: An Introduction to Storage Devices, Subsystems, Applications, Management, and Filing Systems
by Marc Farley
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Mirroring
The most basic form of duplication redundancy is data mirroring, a concept that has been a staple of data center operations for decades. Mirroring is a storing-level function that is abstracted from higher-level functions, such as file systems and databases. Mirroring provides continuous storage I/O operations after a hardware, software, or communications failure keeps data from being accessed from a storage target.
The discussion of mirroring in this chapter does not include remote-copy technology, which is discussed in Chapter 10. While mirroring and remote copy are often discussed and described as being part of the same technology, they are actually quite a bit different. The two are used for different purposes and have significantly ...
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