Method and system for managing multiple database storage units

摘要: The system manages at least a database in multiple storage units, and the is duplicated for redundancy. maintains redundancy security. enables maintenance reorganization of units without interrupting on-going operations involving access to units. non-stop ongoing available by allocating pair main unit an intermediate that substantially identical data. During certain predetermined operations, being dedicating transactions while manipulated contain data corresponds specified time. For example, content subsequently copied or used update another database. When above duplication incorporation completed, updated have taken place during be synchronized with unit.