Globule is a module for the Apache Web server that allows a given server to replicate its documents to other Globule servers. Clients are automatically redirected to one of the available replicas.
Globule is an open-source collaborative content delivery network developed at the Vrije Universiteit in Amsterdam. It is implemented as a third-party module for the Apache HTTP Server that allows any given server to replicate its documents to other Globule servers. This can improve the site's performance, maintain the site available to its clients even if some servers are down, and to a certain extent help to resist to flash crowds and the Slashdot effect.