Confluence 5.6 のサポートは終了しています。
ドキュメントの最新バージョンを確認してください。
Confluence can back up all the content, comments and attachments for a space. The process involves converting the data in the space into XML format. The end product is a zip file that contains XML file(s) that define the content of the space, and optionally a folder containing the attachments in the space. To transfer this data to another Confluence site, you can upload the zip file.
See Exporting Confluence Pages and Spaces to XML.
See Restoring a Space.