Cooperative caching method and apparatus

摘要

Embodiments of the present invention disclose a cooperative caching method and apparatus, relating to the field of network technologies, to improve the local hit ratio without increasing the local server costs. The technical solution provided in the present invention includes: obtaining, according to cache information, end-to-end delay between a local server and a neighbor server, and popularity in a cache list, a consolidated gain value of a cached video segment and a consolidated gain value of a candidate video segment in the local server; and replacing the cached video segment with the candidate video segment when the consolidated gain value of the cached video segment and the consolidated gain value of the candidate video segment in the local server meet a replacement condition.

主权项

1. A cooperative caching method, comprising:
obtaining, according to cache information, end-to-end delay between a local server and a neighbor server, and popularity of a video segment in a cache list, a consolidated gain value of a cached video segment and a consolidated gain value of a candidate video segment in the local server, wherein the cache information comprises an identifier of a video segment and information about a server that stores the video segment, and the information about the server comprises an identifier of the server and a utility value, wherein the utility value is a probability of acquiring, by the local server when receiving a video segment request of a local user, a video segment that is stored in the server corresponding to the identifier of the server, and the utility value is obtained according to the end-to-end delay from the local server to the neighbor server, wherein when a video segment requested by the local user does not exist in the local server, the utility value is a reciprocal of end-to-end delay from the local server to a neighbor server that stores the video segment requested by the local user; and when the video segment requested by the local user exists in the local server, the utility value is infinite; and replacing the cached video segment with the candidate video segment when the consolidated gain value of the cached video segment and the consolidated gain value of the candidate video segment in the local server meet a replacement condition.