CDN

CDN is a long-running process that caches data downloaded from the source and provides it to other peers in P2P networks for download, avoiding repeated downloads of the same files from the source.

Features

• Caches data downloaded from the source
• Provides breakpoint continuation capability
• Supports multiple storage modes
• Support for downloading data sources of different protocols，like http/hdfs/oss

Relationship

• Scheduler triggers download tasks to CDN
• CDN downloads data from the origin site and caches it locally
• DfDaemon gets task piece information from CDN and downloads piece data