Synchronizing data across multiple instances of an application in a cloud

A computer program product for data synchronization, the computer program product comprising a non-transitory computer readable storage medium having program instructions embodied therewith, the program instructions executable by a computer to cause the computer to perform a method comprising:

• registering, in a database accessible by a plurality of nodes included in a cloud cluster system, node information for each of the plurality of nodes during an initialization of an application context for an application having at least one instance of multiple instances running on each of the plurality of nodes;
• storing an update for data in (i) a local storage of a given one of the plurality of nodes and (ii) the database, responsive to a request to update the data received by the given one of the plurality of nodes;
• generating a modified version of the request that includes details for the updated data;
• and
• calling an application programming interface (API) to update a state of respective local storages for other ones of the plurality of nodes with the update responsive to the modified version of the request, such that the update is synchronized across the at least one instance of the multiple instances running on each of the plurality of nodes.

A cloud cluster system, comprising:

• a plurality of nodes;
• and
• a database accessible by the plurality of nodes,
• wherein each of the plurality of nodes has a local storage and is configured to register its node information in the database during an initialization of an application context for an application having at least one instance of multiple instances running on each of the plurality of nodes,
• wherein the plurality of nodes are further configured such that responsive to a request to update data received by any given one of the plurality of nodes, the given one of the plurality of nodes:
• (a) stores an update for the data in (i) the local storage of the given one of the plurality of nodes and (ii) the database,
• (b) generates a modified version of the request that includes details for the updated data, and
• (c) calls an application programming interface (API) to update a state of respective local storages for other ones of the plurality of nodes with the update responsive to the modified version of the request, such that the update is synchronized across the at least one instance of the multiple instances running on each of the plurality of nodes.