Abstract: A method of processing data includes identifying a capture redo byte address, initiating a capture process at the capture redo byte address, creating a clone of a source database to a logical change number, and initiating an apply process at a target database.

Abstract: A computer readable storage medium includes executable instructions to receive a specification for requested data in a log based replication system where data changes are retrieved from both a transaction log and a database. It is determined that the requested data is compromised. A search for a data image containing the requested data is initiated. The data image is accessed to secure the requested data. The requested data is returned.

Abstract: A computer readable medium storing executable instructions includes executable instructions to: receive a continuous stream of database transactions; form batches of database transactions from the continuous stream of database transactions; combine batches of database transactions with similar operations to form submission groups; identify dependencies between submission groups to designate priority submission groups; and apply priority submission groups to a database target substantially synchronously with the receipt of the continuous stream of database transactions.

Abstract: A computer readable medium storing executable instructions includes executable instructions to: receive a continuous stream of database transactions; form batches of database transactions from the continuous stream of database transactions; combine batches of database transactions with similar operations to form submission groups; identify dependencies between submission groups to designate priority submission groups; and apply priority submission groups to a database target substantially synchronously with the receipt of the continuous stream of database transactions.

Abstract: A method of processing data includes identifying a capture redo byte address, initiating a capture process at the capture redo byte address, creating a clone of a source database to a logical change number, and initiating an apply process at a target database.

Abstract: A method of processing data includes identifying a capture redo byte address, initiating a capture process at the capture redo byte address, creating a clone of a source database to a logical change number, and initiating an apply process at a target database.

Abstract: A computer readable storage medium includes executable instructions to gather first committed transactional record from a first transaction log associated with a first data source. The first committed transactional record is converted to a homogeneous format to form a first homogeneous transactional record with a common transaction record header containing transactional context information from the first data source. A second committed transactional record is collected from a second transaction log associated with a second data source with a format different than the first data source. The second committed transactional record is changed to the homogeneous format to form a second homogeneous transactional record with a common transaction record header containing transactional context information from the second data source. The first homogeneous transactional record is combined with the second homogeneous transactional record to form a homogeneous transaction data store.

Abstract: A computer readable medium includes executable instruction to compare databases. The executable instructions are configured to identify when a segment of a first database is conditionally out of synchronization with a corresponding segment of a second database to establish a conditionally out of synchronization state at a first time. Executable instructions allow a latency period after the first time in which changes are made to the first database and the second database. Executable instructions also determine after the latency period whether the segment of the first database is in synchronization with the corresponding segment of the second database. Executable instructions also populate a resynchronization table, which is used by a replication mechanism to bring asynchronous rows into synchronization.