Concurrent request handling for database transactions

A computer-implemented method for executing instructions stored on a computer readable storage medium, the method comprising:

• receiving transaction requests for transactions to be executed using data of a database;
• classifying a first transaction request of the transaction requests as a simple transaction request, wherein the simple, transaction request includes a first transaction that at least partially alters data being requested;
• classifying a second transaction request of the transaction requests as a complex transaction request, wherein the complex transaction request includes a second transaction that at least partially alters data being requested;
• executing the first transaction satisfying the first transaction request, using a key-value store of pre-calculated results determined prior to receipt of the first transaction request, and based on the data;
• executing the second transaction satisfying the second transaction request, using a relational store including a subset of the data;
• updating a key-value delta reflecting a change of the key-value store caused by the first transaction;
• updating a relational delta reflecting a change of the relational store caused by the second transaction;
• and
• executing a two-way synchronization between the key-value store and the relational store, based on the key-value delta and the relational delta.

A computer program product, the computer program product being tangibly embodied on a non-transitory computer-readable storage medium and comprising instructions that, when executed, are configured to:

• receive transaction requests for transactions to be executed using data of a database;
• classify a first transaction request of the transaction requests as a simple transaction request, wherein the simple transaction request includes a first transaction that at least partially alters data being requested;
• classify a second transaction request of the transaction requests as a complex transaction request, wherein the complex transaction request includes a second transaction that at least partially alters data being requested;
• execute the first transaction satisfying the first transaction request, using a key-value store of pre-calculated results determined prior to receipt of the first transaction request, and based on the data;
• execute the second transaction satisfying the second transaction request, using a relational store including a subset of the data;
• update a key-value delta reflecting a change of the key-value store caused by the first transaction;
• update a relational delta reflecting a change of the relational store caused by the second transaction;
• and
• execute a two-way synchronization between the key-value store and the relational store, based on the key-value delta and the relational delta.