What mechanisms are used for asynchronous data copying between databases?

Asynchronous data copying between databases is usually implemented using the following mechanisms:

• Logical Replication: changes in the source database are recorded in the transaction log (WAL), from which they are asynchronously read and applied to the target database.

• Message Queues: changes are published to a queue (e.g., Kafka, RabbitMQ), and consumers from another database read and apply these changes.

• Change Data Capture (CDC): a technology that tracks changes in the database (via transaction logs or triggers) and transmits them to another system asynchronously.

• ETL processes: periodic extraction and loading of data using Extract-Transform-Load tools.

In Go, such mechanisms are often implemented using goroutines and channels for parallel processing, as well as libraries for working with specific DBMS and message queues.