Techniques for evicting cached files
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United States of America Patent
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Jan 19, 2016
Grant Date -
N/A
app pub date -
Dec 16, 2013
filing date -
Dec 16, 2013
priority date (Note) -
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Abstract
Techniques for evicting cached files may be realized as a method including: maintaining a file system cache storing selected files from a file storage; for files that are above a threshold size, selectively storing chunks of the files; for each file that is stored, associating an access bit and a size bit with that file; for each file that is stored selectively as file chunks, associating an access bitmap to the file having an access bit associated with each file chunk; when a file is accessed, setting the access bit associated with the file and file chunk to indicate recent access; at set intervals, periodically clearing the access bits to not indicate recent access; and carrying out a cache eviction process comprising evicting at least one file or file chunk associated with an access bit that does not indicate recent access.
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