Question
When you have high availability of servers, you have seen diagrams with a "sink" server. What does the word "sink" signify?
Answer
A sink, homophonic with "sync", is a secondary server in a cluster or replication configuration. That is, there is a primary server that is actively processing transactions of databases or registering changes to files. This primary server may replicate changes over to a secondary or sink server. The sink server receives the changes secondarily from the primary server.