Scalable multi-database event processing system using universal subscriber-specific data and universal global data

A machine-readable medium for a computer system, the machine-readable medium having stored thereon a series of instructions which, when executed by a processing component, cause the processing component to process an event in an event processing system comprising a plurality of databases, wherein the event processing system is associated with a plurality of accounts, and wherein each database in the plurality of databases is configured to store account data for a unique subset of accounts in the plurality of accounts, by:

• receiving, at a first server configured to manage a first database in the plurality of databases, an event associated with an account in the plurality of accounts,
• wherein processing the event requires access to account data for the account, and
• wherein the first database stores account data for a first subset of accounts;
• if the account is included in the first subset of accounts, retrieving the account data for the account from the first database;
• else if the account is not included in the first subset of accounts:
• accessing a data structure stored on the first database,
• wherein the data structure includes, for each account in the plurality of accounts, an identifier uniquely identifying said each account and location information indicating a database in the plurality of databases on which account data for said each account is stored;
• determining, based on the data structure, a second database in the plurality of databases that stores the account data for the account,
• wherein the second database stores account data for a second subset of accounts distinct from the first subset;
• and
• retrieving the account data for the account from the second database;
• and
• processing the event utilizing the account data for the account.