This extension enables cloud storage using Riak as file storage service. It's very easy to setup and enables horizontal scalability regarding chat files storage.
See: http://basho.com/riak/ http://littleriakbook.com/
How to install?
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Edit settings/settings.ini.php and activate extension. Add it as the last one 'extensions' => array ( 0 => 'riakfilestorage', ),
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Rename extension/riakfilestorage/settings/settings.ini.default.php to extension/riakfilestorage/settings/settings.ini.php Edit settings extension/riakfilestorage/settings/settings.ini.php
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Edit nginx configuration to proxy images request to riak directly. Example of that in nginx case see nginx.conf.example