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Disk I/O Tuning

Chapter 2: Fibre Channel

Channels and Fibre Channel

Traditional disk drive communications occur in a channel environment where the host controls the devices attached to it. The primary requirement for channel environments is to provide error-free delivery, at the bit level, with transfer delays being a secondary consideration.

Networks and Fibre Channel

Networks are designed to allow many devices to communicate with each other as desired. This usually involves software support to route transactions to the correct provider and to verify access permission. Networks are generally used for transferring data with “error-free delivery” and voice and video where “delivery on time” is the primary requirement with error-free delivery being a secondary consideration. For example, when transferring video, it is more important to provide on-time delivery of data to prevent loss of video frames than to lose one or two pixels in a video frame.

The above text is an excerpt from:

Oracle Disk I/O Tuning
Disk IO Performance & Optimization for Oracle Databases



by Mike Ault

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