Question-60: QuickTechie Inc. has approached you for assistance in moving their MySQL implementation that is now hosted on-premises to the cloud. During the move, they want their on-premises system to have as little downtime and as little of an effect on performance as possible. The active-active and active-passive clustering topologies are the two that are used in high availability (HA) environments the most often. Which strategy would you advise someone to take?
A. Make a dump of the MySQL master server on-premises, then turn it off, upload the dump to the cloud, and load it into a new MySQL cluster.
B. Set up a MySQL replica server/slave in the cloud environment and set it up to replicate data from the MySQL master server on-premises in an asynchronous way until the cutover.
C. Make a new MySQL cluster in the cloud, set up applications to start writing to both the on-premises MySQL masters and the cloud MySQL masters, and then destroy the old cluster when the switch is made.
D. Create a dump of the MySQL replica server in the cloud environment, load it into Google Cloud Datastore, and set up applications to read and write to Cloud Datastore at cutover.

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