Service/mirrors
Introduction
A content delivery network or content distribution network (CDN) is a system of computers containing copies of data, placed at various points in a network so as to maximize bandwidth for access to the data from clients throughout the network. A client accesses a copy of the data near to the client, as opposed to all clients accessing the same central server, thereby causing a bottleneck near that server.
Mirrors
The current list of available mirrors is available at http://mirrors.sugarlabs.org/
Goals
- Reduce bandwidth at primary download server.
- Improve quality of service for users.
- Move content closer to users.
Setting up a Mirror
Setting up a mirror is very easy. All you need is a web server which is available via http, and (if possible) rsync.
Please contact systems@sugarlabs.org if you are interested.
System Summary
The Sugar Labs Content Delivery Network uses MirrorBrain as a redirector. The redirector, which lives in a Sugar Labs data center, keeps track of which files are available on which mirror. When a a user requests a file, the redirector points the user to the correct mirror and automatically starts the file download.
Mirrors
Mirrors are completely passive. To set up a mirror, an mirror system administrator needs to:
- Set up rsync job to synchronise a copy of the files on downloads.sugarlabs.org onto their local system.
- Alert the Sugar Labs system administrators that they would like their mirror into rotation.
Redirector
- Register mirror with mirrorbrain.
- mirror probe