In distributed systems using Redis as data store, it's common to have one master and multiple replicas for fail-safe and load balancing mechanisms. A specific use-case for this keyword could be when a developer wants to retrieve details about these replicas or monitor the status of the replicas from a Python-based application.
To interact with Redis in Python, we can use
redis-py, a Python interface to all Redis commands.
Let's assume you have already connected to Redis:
Here's how you can get details about connected replicas:
This will return a dictionary containing various details about the replication status, including the number of connected replicas, their IPs, ports, offsets, and so on.
What do I do if there are no replicas? If the result doesn't show any replicas, then you might not have set up any replicas for the Redis server, or they might be down.
What if I get a connection error?
If you receive a
ConnectionError, this may mean that Redis is not running on the specified host and port, or your client machine isn't able to connect due to network issues.