Changes

[[Category:Resource]]

[[Category:Resource]]

==Introduction==

== Introduction ==

A content delivery network or Content Delivery 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.

A content delivery network or Content Delivery 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.

==Goals==

== Goals ==

* Reduce bandwidth at primary download server.

* Reduce bandwidth at primary download server.

* Improve quality of service for users.

* Improve quality of service for users.

* Move content closer to users, thus reducing latency.

* Move content closer to users, thus reducing latency.

==Mirrors==

 

== Mirrors ==

The current list of available mirrors is available at http://mirrors.sugarlabs.org/

The current list of available mirrors is available at http://mirrors.sugarlabs.org/

Please contact sysadmin AT sugarlabs DOT org if you are interested in hosting a mirror.

== Setting up a new mirror ==

== System Summary ==

=== For mirror administrators ===

The Sugar Labs Content Delivery Network uses [http://www.mirrorbrain.org/ 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 user requests a file, the redirector points the user to the correct mirror and automatically starts the file download.

All you need is a web server with enough bandwidth to serve the files. To set up a new mirror, the site administrator needs to:

* Set up rsync job to synchronize a copy of the files on http://downloads.sugarlabs.org onto their local system. You can schedule it daily or more frequently, but please don't sync more often than once per hour.

* Set up rsync job to synchronize a copy of the files on http://downloads.sugarlabs.org onto their local system.

* Publish the files via HTTP and -- if possible -- rsync. Rsync allows for efficient [http://www.mirrorbrain.org/features/#mirror-monitoring mirror monitoring] (scanning). FTP is less efficient, but still preferred over an HTTP-only mirror.

* Publish the files via HTTP and -- if possible -- rsync. Rsync allows for efficient [http://www.mirrorbrain.org/features/#mirror-monitoring mirror monitoring] (scanning). FTP is less efficient, but still preferred over an HTTP-only mirror.

* Alert the Sugar Labs system administrators that they would like their mirror into rotation, including the following information in the request:

* Alert the [[Infrastructure_Team/Contacts|Sugar Labs System Administrators]] that they would like their mirror into rotation, including the following information in the request:

** Name and URL of the mirror operator (e.g. organisation)

** Name and URL of the mirror operator (e.g. organization)

** Name and email address of the administrative contact

** Name and email address of the administrative contact

** [http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 ISO 3166-1 alpha-2] country code of the server location

** [http://en.wikipedia.org/wiki/ISO_3166-1_alpha-2 ISO 3166-1 alpha-2] country code of the server location

** HTTP base URL of the files on the mirror

** HTTP base URL of the files on the mirror (typically http://mirrors.example.org/sugarlabs/)

** rsync base URL of the files on the mirror

** rsync base URL of the files on the mirror (typically rsync://mirrors.example.org/sugarlabs/)

 

 

=== Adding a new mirror to the Mirror Brain redirector ===

To add a new mirror to the MirrorBrain redirector:

* Choose a name for the mirror, usually the host name.

* Choose a name for the mirror, usually the host name.