Systems and methods for the efficient reading of data in a...

Details Systems and methods for the efficient reading of data in a... Systems and methods for the efficient reading of data in a...

2007-06-26

2007-06-26

Ellis, Kevin L. (Department: 2188)

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

Reexamination Certificate

active

10418967

ABSTRACT:
The invention is related to methods and apparatus that efficiently store and read data in a cache for a server system, such as a media server. The cache stores data for file formats of a streamable file format, such as an MPEG-4 file format. Relatively frequently accessed portions of a streamable file format are maintained with long-life links. For example, selected child atoms of sample table atoms of MPEG-4 file formats can be relatively frequently accessed during the streaming of a media presentation. A virtual address space manager for selected child atoms maintains relatively long-life links to pages or segments of data in a cache that hold data corresponding to these child atoms and can advantageously inhibit the release of these segments to enhance a hit rate for the cache and decrease an amount of thrashing, i.e., repeated paging of data to the cache.

REFERENCES:
patent: 4414644 (1983-11-01), Tayler
patent: 4928239 (1990-05-01), Baum et al.
patent: 4980823 (1990-12-01), Liu
patent: 6988169 (2006-01-01), Burger et al.
IBM TDB, “Biased Partitioned LRU Cache Replacement Control”, May 1977, vol. 19, Issue 12, p. 4697.
IBM TDB, “Frequently Used Data Flush Avoidance In Cache Backing Store”, Mar. 1979, vol. 21, Issue 10, p. 4199.

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