Disconnected operation within distributed database systems

A computer-implemented method for disconnected operation within a distributed database, the distributed database comprising a plurality of nodes, each node in the plurality of nodes comprising a corresponding processor and a corresponding memory and communicatively coupled to each other node via at least one communication network, the distributed database including two or more predefined regions, each node of the plurality of nodes belonging to a predefined region of the two or more predefined regions, the computer-implemented method comprising:

• monitoring, via a first node belonging to a first predefined region of the two or more predefined regions, network connectivity between the first predefined region and other predefined regions of the two or more predefined regions;
• in response to detecting an interruption in the network connectivity, transitioning, nodes of the plurality of nodes in the first predefined region to a disconnected mode;
• provisionally committing a database transaction by a node within the first predefined region while in the disconnected mode;
• determining, that the network connectivity has been restored between the first predefined region and the other predefined regions of the two or more predefined regions;
• in response to determining that the network connectivity has been restored, transitioning all nodes in the plurality of nodes to a healing state;
• transitioning, by a second node in the first predefined region, nodes of the plurality of nodes in the first predefined region from the disconnected mode to a normal mode of operation;
• and
• constructing, via the second node, a global database state for the distributed database based at least in part on the provisionally committed database transaction.