Simultaneous processing of read and write requests using optimiz

Details Simultaneous processing of read and write requests using optimiz Simultaneous processing of read and write requests using optimiz

1998-02-09

2000-02-08

Peikari, B. James

Electrical computers and digital processing systems: multicomput

Computer-to-computer data routing

Least weight routing

711156, 711158, 710 44, G06F 1318

Patent

active

060237201

ABSTRACT:
The disk scheduling system supports the processing of simultaneous storage device read and write requests in a video server environment, thereby supporting both video-on-demand and non-linear editing applications. Read requests are the result of movie viewing, while write requests are the result of video clip editing or movie authoring procedures. Due to real-time demands of movie viewing, read requests have to be fulfilled within certain deadlines, otherwise they are considered lost. Since the data to be written into the storage device is stored in main memory buffers (or write buffers), write requests can be postponed until critical read requests are processed. However, write requests still have to be proceeded within reasonable delays and without the possibility of indefinite postponement. This is due to the physical constraint of the limited size of the main memory buffers. The new process treats both read and write requests in a homogenous manner in order to ensure that the deadlines are met and avoids indefinite postponement and large buffer sized in the case of storage device writes utilizing a single queue of requests.

REFERENCES:
patent: 5535202 (1996-07-01), Kondoh
patent: 5907683 (1999-05-01), Engelsiepen et al.
patent: 5944792 (1999-08-01), Yamato et al.

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