Database Replication and the Types of Tools

 

Replication is the process where data is continually copied electronically from one database in a server or computer to another database in another server or location. This results in a distributed database where users can access necessary data without interfering in the work of others who are accessing the same data or server from the same or a different place. However, the replication process is not simple and can be precisely done only by following the right processes and using the most optimized tools.



To make the process a success, the best database replication tool should be used. There are fundamentally three types of such tools and organizations should choose one that matches their need.

Snapshot database replication tool – It is a simple process where a “snapshot” of the data in one server is taken and moved to a separate server or a database in the same server. After the first synchronization is completed, the tool refreshes the data in the published tables over fixed pre-determined periods.

Transactional database replication tool – This tool copies data from the publisher to the subscriber/s once. Transactions are subsequently delivered to the subscriber/s as and when they occur on the publisher. The first set of the data is transmitted as in snapshot replication and thereafter, only changes to the database are forwarded to the subscriber/s.

Merge database replication tool – Here the tool merges data from several sources into a single database folder. The migration process is similar to the transactional tool but here, merge replication allows changes of the same data on both publishers and subscribers, even when the latter is not connected to the network. 

These are some of the most-used database replication tools.

 

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