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 Fair Queuing Disk Schedulers

Following the recent release of an anticipatory IO scheduler, Andrea Arcangeli started a lengthy thread in which he proposed an SFQ (Stochastic Fair Queuing) disk scheduler. The idea was picked up by Jens Axboe who had evidently worked on a similar idea earlier. Jens quickly posted two different disk schedulers utilizing "fair queuing" algorithms, more commonly used in handling network traffic. When someone suggested he was reinventing the wheel, Jens replied, "There's no wheel reinventing here, just applying the goodies from network scheduling to disk scheduling."

Read the full story at KernelTrap.

 (Submitted by Jeremy Andrews Thu Feb 13, 2003 )


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