Media server for storage and retrieval of voluminous multimedia

Details Media server for storage and retrieval of voluminous multimedia Media server for storage and retrieval of voluminous multimedia

1996-10-23

1999-07-20

Pan, Daniel H.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

711111, 711202, 711216, G06F 1337

Patent

active

059266490

ABSTRACT:
A method and apparatus for storage and retrieval of multiple data streams in a multimedia distribution system. A given data stream is separated into a plurality of portions, and the portions are stored in a multi-disk storage system with Y disks each having X zones such that the ith portion of the given stream is stored in zone (i mod X) of disk (i mod Y). The number X of zones per disk and the number Y of disks are selected as relatively prime numbers. The stored data are retrieved using Y independent retrieval schedulers which are circulated among the Y disks over a number of scheduling intervals. Each retrieval scheduler processes multiple requests separated into X groups, with the requests of each group accessing the same disk zone during a given scheduling interval. The retrieval schedulers are also configured such that the retrieval requests of a given retrieval scheduler access the same disk during a given scheduling interval. The data stream placement technique in conjunction with the retrieval schedulers provide sequential-like parallel retrieval suitable for supporting real-time multimedia data distribution for large numbers of clients.

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