Distributed computing systems and system compnents thereof

A multi-site computing system architecture, comprising:

• a network system;
• and
• a plurality of distributed computing systems interconnected via the network system;
• wherein each one of said distributed computing systems includes a respective replicated state machine and a respective local application node connected to the respective replicated state machine;
• wherein the respective replicated state machine of each one of said distributed computing systems:
• facilitates management of proposals for enabling coordinated execution of said proposals by the distributed application node of all other ones of said distributed computing systems;
• facilitates agreement on said proposals;
• precludes repeated preemptions of rounds in attempting to achieve agreement on said proposals;
• and
• reclaims persistent storage utilized for storing at least one of proposal agreements and said proposals.

A method, comprising:

• facilitating agreement on proposals received from a local application node;
• precluding repeated preemptions of rounds in attempting to achieve agreement on said proposals;
• and
• reclaiming respective persistent storage utilized for storing at least one of proposal agreements and said proposals.