Abstract text

The present invention provides an alternate system as a backup system of a production system for processing transactions. The alternate system includes a restoring unit for obtaining, from a storage unit of the production system that stores data including at least one update regarding a transaction processed with the production system, the data including the at least one update at the last time the transaction was committed before a quiesce point to copy the obtained data to a storage unit in the alternate system, a copying unit for copying an update that is selected from a message queue that stores the update and information that is associated with each update and can identify the quiesce point, by using the information that can identify the quiesce point, and committed at the quiesce point or later, to the storage unit of the alternate system, and a transaction processing unit for taking at least one transaction from an accepting queue that accepts transaction processing upon completion of copying the selected update to start processing of the taken transaction.