Abstract: Embodiments of the present invention disclose a method and an apparatus for transaction processing. The method includes: receiving a transaction request, determining, when it is determined that a real-time account book is undergoing compute-intensive transaction processing, whether an account record of an account on which a transaction is to be performed exists in a temporary account book, and if yes, processing the transaction request based on the account record, and updating the account record in the temporary account book according to a processing result, and if no, reading the account record from the real-time account book, processing the transaction request based on the account record, and recording, in the temporary account book, the updated account record according to a processing result; and updating, after the transaction processing is complete, the real-time account book according to the temporary account book, and deleting the account record after the updating.

Abstract: A system, an apparatus, and a method for upgrading a service are provided herein. The method includes: loading and registering the upgraded new service version, and retaining the service of the old version; receiving a service processing request, and sending the received service processing request to the service processing device which is loaded with the service version corresponding to the service processing request according to the stored mapping relation between the service processing request and the information about the version of the service. In this way, the data loss is reduced or avoided in the service upgrade process, and the service works normally after the upgrade.