Joakim Brännström (joakim.brannstrom@gmx.com)

Updates the distssh server cache.

Design

The overall design is based around a shared, local database that is used by both the daemon and clients to exchange statistics about the cluster. By leveraging sqlite for the database it becomes safe for processes to read/write to it concurrently.

The heartbeats are used by both the client and daemon:

* The client spawn a daemon if the daemon heartbeats have stopped being updated. * The server slow down the update of the cluster statistics if no client has used it in a while until it finally terminates itself.