Nuance will conduct fail-over testing for our Dragon Medical Cloud services on November 21, 2019 from 3:00 AM to 5:00 AM EST.
Dragon Medical Cloud services are currently deployed in an active/active configuration for maximum reliability. In the event of a single data center failure, the remaining data centers are configured to handle all Dragon Medical traffic.
To ensure that the network can successfully reroute traffic under all failure conditions, Nuance will conduct live fail-over testing in our production environment on November 21, 2019 from 3:00 AM to 5:00 AM EST. During the testing, Nuance will mark one of the ACTIVE data centers as “down,” which will force all traffic to reroute to the remaining healthy ACTIVE data centers. Once the test is complete, they will bring the data center that was marked “down” back online and traffic will naturally load balance across all data centers.
Nuance chose 3:00 AM EST to perform testing because it is the lowest traffic period. Dragon Medical One users will automatically and transparently fail-over to the new data center with no service interruption. The same is true for any speech-enabled mobile or desktop applications. If you are using a browser-based application from one of our partners you may see a transient error message but then normal speech recognition services will resume.
This procedure has been tested extensively in QA and staging environments, but it is necessary to test in a production environment to guarantee proper operation. Going forward, Nuance will conduct periodic disaster recovery tests in production as part of our overall business continuity strategy.
If you have questions or concerns please contact us.