With Shadowbase active/active systems, there is no longer any need to take the production application down and deny service to your users to upgrade hardware, software, the database, or the application itself. All that is necessary is to switch users from the node to be upgraded to another node, perform the upgrade, test it, and then return the users to the upgraded node. In this way, upgrades can be rolled through all nodes in the application network without ever denying service to a user.
In addition, the system’s capacity can be easily expanded by adding new nodes in a similar fashion.
The Shadowbase technology provides the tools necessary for these zero downtime migrations. Its online copy facility, the Shadowbase AutoLoader, recreates the current state of the database on the new or upgraded node. Its data replication engine then keeps this database copy current until users are returned to that node. The Shadowbase technology provides the facilities to move the users to other nodes without losing their data should a problem occur with the new node.
Active/Active Pages:
- Part 1 - What is an Active/Active System?
- Part 2 - Why Does Active/Active Work?
- Part 3 - Shadowbase Database Synchronization
- Part 4 - Eliminate Planned Downtime
- Part 5 - Why Choose Shadowbase Technology?
