To save on licensing costs, the on-premises, IaaS-hosted databases need to be migrated to a public DBaaS solution. Which of the following would be the BEST technique?
D. Database replication
Database replication would be the best technique to migrate on-premises IaaS-hosted databases to a public DBaaS solution while saving on licensing costs. Database replication involves copying a database from one location to another, which can be done in near real-time. This allows the data to be continuously synchronized between the on-premises database and the public DBaaS solution, without disrupting operations or requiring a complete migration all at once. Additionally, database replication can be done with minimal downtime and minimal impact to the performance of the database.
To save on licensing costs and migrate on-premises databases to a public Database as a Service (DBaaS) solution, the BEST technique would be:
**D. Database replication.**
Here's why:
A. Live migration typically involves moving a virtual machine or application from one host or environment to another with minimal downtime. It might not be directly applicable when migrating to a DBaaS, as DBaaS solutions often require a different approach.
B. Physical-to-virtual (P2V) migration is used when converting physical servers to virtual machines. This is not relevant when migrating to a DBaaS, as DBaaS typically abstracts the underlying hardware.
C. Storage-level mirroring is a technique for redundancy and disaster recovery, not a method for migrating databases to a DBaaS platform.
D. Database replication involves creating a copy of the database in the target environment, and it's a common technique for database migrations. Depending on the DBaaS provider and the database technology being used, various replication methods (e.g., snapshot replication, transactional replication) can be employed to ensure minimal downtime during migration.
Database replication allows for a smooth transition from on-premises to DBaaS while minimizing downtime and ensuring data consistency, making it the most suitable option for this scenario.
Live migration and physical-to-virtual are techniques used for migrating VMs, not databases. Storage-level mirroring is a data protection technique and is not used for database migration.
The key principle is "on-premises migration to DBaas." DBaas is less expensive than any IaaS whether the "Infrastructure" is in the cloud or on-premise. On the use of "Iaas" in the question is a distraction. The use of a DB doesn't change but the infrastructure does; i.e., physical-to-virtual. Comptia Cloud+ mindset....
DB replication can copy the functioning DB over to the public environment in real-time while keeping the source DB operational
upvoted 2 times
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