Abstract: A data center is a computing environment focusing on the execution of data transactions for corporations and organizations. The data center has the capability of running many execution threads in parallel. However, a major portion of such transactions require in order processing. Guaranteeing this requirement may mean not running the data center at it's full capacity as some of it's threads may be stopped to guarantee a correct operation. The present invention will enable running the data center at fuller processing capacity while guaranteeing correctness. For a data store of a certain corporation selection criteria will be used, The selection criteria will determine what subset of the data will be used and also what are the basic elements—a FIFO will be designated for each such element using the indices, and the execution will be allowed only at the FIFO order and only one thread will be able to deal with a FIFO. The other threads will be able to deal with other FIFOs.