Methods and systems for controlling fragment load on shared links

摘要

Controlling fragment load on shared links, including a large number of fractional-storage CDN servers storing erasure-coded fragments encoded with a redundancy factor greater than one from contents, and a large number of assembling devices configured to obtain the fragments from sub-sets of the servers. At least some of the servers share their Internet communication link with other Internet traffic, and the fragment traffic via the shared link is determined by the number of sub-sets in which the servers accessed via the shared link participate. Wherein the maximum number of sub-sets in which the servers accessed via the shared link are allowed to participate is approximately a decreasing function of the throughput of the other Internet traffic via the shared link.

主权项

1. A content delivery system, comprising:
a large number of fractional-storage CDN servers configured to store erasure-coded fragments associated with segments of contents; wherein a fractional-storage CDN server is configured to store less than a minimum amount of data required to reconstruct the segments, a large number of assembling devices configured to obtain the erasure-coded fragments from sub-sets of the fraction-storage CDN servers; and at least one shared link operative to transport data traffic comprising erasure-coded fragment traffic generated by at least one of the fractional-storage CDN servers and other Internet traffic, wherein the system is configured to utilize not more than a portion of the communication bandwidth of the shared link that is not in use by the other Internet traffic, by restricting the number of assembling devices concurrently served by the fractional-storage CDN server.