Shulou(Shulou.com)06/01 Report--

Default: the primary node is responsible for data reading and writing, and the secondary node backs up the data on the primary node, but the arbiter node

Data is not synchronized from the primary node

Arbiter function:

When the primary node fails, a primary node can be selected from the second node and will not participate in data reading and writing.

Mongodb implements synchronization between data sets between replication sets through oplog.rs.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.