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COVID-19 initial surge at Wuhan, China brought the pivotal role of virtual enterprise data ware houses in Supply Chain Management (SCM), eventually became a major drive momentum towards Always Available Always Online (A3O) heterogeneous data networks Reliable and tightly coupled information deluge in the unprecedented trends toward the smart city development as well as deployment of adhoc huge Disaster Management Center (DMC), as regional Centers for Disease Control (CDC) to name a few;are prone to issues on stability, reliability and availability Smart data storage resources are vulnerable to provide functionality due to their inherent heavy dependence on System Down Time, Redundant Systems and Software Failure or whole multiple site failures In the absence of Production Database Management Services, duplicate deployment of similar data on disjoint but similar architecture provides a Tightly Coupled Ultimate System, which assures A3O mutually exclusive services In this paper, we investigated active Data Guard and Data Guard role management or switchover for a real time transition performed for database at standby state to cope up both planned maintenance and accidental RS2F events We expose our results for deep integration of active Data Guard with ODB in-terms of Fast Sync to align synchronously at an ease of zero of wait states for disk I/O and configurability to Null Data Loss Over a large range of remote or standby databases null data lost make it certain to zero failover The impact of Fast-Start Failover in the cloud proximity make sure guaranteed null data lost in synchronously and near null data lost protection asynchronously Hence, avoids unusual overhead impeding disk I/O and eventually on a primary database We observe the key performance indicator in failover does not restart the standby database for primary role resumption, but introduce cloud proximity as a new primary database and the process is performed without any intervention of manual migration The reliability of active data guard Redo is flexible across not only standby databases but also primary sites running different operating system over diverse hardware platforms The Redo capability enables migration with minimal downtime for any transaction in the clouds, therefore adds an inevitable functionality to big data applications © 2005 - ongoing JATIT & LLS
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