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VODSTOK version 1.1 (Voluntary Distributed Storage Kit) 1. Introduction Vodstok is an opensource and free and viral project that aims to provide a collaborative distributed storage to users who want to store and share temporarily files on the Internet with other users. 2. Why "Voluntary Distributed Storage" ? The concept of "Voluntary distributed storage" is very simple: volunteers agree to let other users store data on a part of their webservers, and all those parts put together create a big storage place where data can be pushed and pulled. Data is sent encrypted (AES128) and a key is required to decrypt the content, that means nobody can tell what is stored on a server. Files are cut in parts (called "chunks") and these parts are sent to several servers where Vodstok is installed (called "endpoints"). Endpoints are in fact open storage points where clients can send data to store, whatever this data is. 3. What does Vodstok need to be installed ? You only have to own a web server, with PHP version 4.X or 5.X. Drop the content of the www/ directory in a directory called "vodstok" for instance, and make sure the chunks/ directory is not readable on your server. Modify config.inc.php to specify the maximum amount of disk space you allow to Vodstok (in MB). Get the vodstok client (located in the client/ directory) and declare your endpoint: $ ./vodstok -a http://your.web.server/vodstok/ Once done, you can upload and download files to your server, and share its URL. Other people using vodstok will be able to register and use your endpoint for file sharing. If a server goes down, the whole network stays available (but in fact many files could have been impacted by the shutdown, the actual vodstok client providing no redundancy at all). It is also strongly recommended to publish your endpoint (through the -p option) and to update the endpoints list on a regular basis (thanks to the -u option). 4. Why is this project "viral" ? Once your Vodstok server functional, please drop the last version of Vodstok in the root directory of this web application. A webpage will be displayed when browsing the index page, and the kit would be available from this page. This is the "viral" part. 5. How to use Vodstok client ? Vodstok client is pretty simple and still in beta. Server-side scripts are very lite and would not be modified later, but our client will be updated regularly. Many operations can be performed with the provided client: - endpoint management (registration, removal, listing) - global capacity assessment - upload of a file - download of a file thanks to a specific URL