Y::Notifier - Specification - Client and server start up

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• A client, on startup, tries to contact a local server
• If that fails it will start a local server
• The server, on startup, locks a file to ensure it is alone
• Then the server sets up its listening sockets etc.
• The server then multicasts a short "I'm here" message to other servers, immediately upon startup and once a minute thereafter
• Other servers recieving this message will attempt to connect to the new server
• The server will accept these connection requests, contingent upon certain security checks
• The new server will also hear other server's "I'm here" messages and attempt to connect to them
• In the case of crossed lines, a sort on IP address determines which servers connection request succeeds

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Y::Notifier - Specification - Client and server start up