Question

The environment continues working even, if a slave fails

Answer 1

The environment continues working even ,if a slave fails and the slave again starts to work then the master sends updated data to the slave.

Masters and slaves are generally redis servers.

All slaves have the same data as the master.

The master server can be many as a slave per server. When a new slave is inserted into the environment, the master automatically syncs all the data with the slave.