E-commerce transactions informations is traditionally stored in RDBMS. In this paper we consider that transaction tracking information is stored as XML documents in RDBMS geographically distributed. In order to support fault-tolerance and persistent storing service we propose a replication service. It provides a high available document retrieval against possible server failures, granting the access to the last version of the document. The service also allows to perform queries over the persistent data store in order to recover commercial transaction information from the replicated persistent store.