Question: How can you monitor Redis replication?


Monitoring Redis replication involves checking the status and health of master-slave (or primary-replica) synchronization. Here are some methods to do that:

1. Using Redis CLI:

You can use the Redis command-line interface (CLI) to inspect the status of Redis replication. The INFO REPLICATION command provides a lot of information about the current state of the master and its replicas.

Here's an example of how you might use it:


This will provide output indicating the status of the replication, like so:

# Replication role:master connected_slaves:1 slave0:ip=,port=6380,state=online,offset=83,lag=1 master_replid:935b75e6902a1778dcf5c9a000ca66342514fe87 master_replid2:0000000000000000000000000000000000000000 master_repl_offset:83 second_repl_offset:-1 repl_backlog_active:1 repl_backlog_size:1048576 repl_backlog_first_byte_offset:1 repl_backlog_histlen:83

2. Using Redis Monitoring Tools:

There are also many third-party tools like Redis Insight, Datadog, Redis-stat, etc., that provide a more detailed and user-friendly view to monitor Redis instances, including replication status.

For instance, with Redis Insight, you can visually monitor your Redis replication and other key metrics.

3. Using Redis Sentinel:

Redis Sentinel provides high availability for Redis. In addition, it has built-in monitoring capabilities. It continually checks if your master and slave instances are working as expected.

Remember to choose a method that best suits your project's needs and technical setup. Monitoring your Redis replication is critical to ensure data consistency and redundancy in your application.

Was this content helpful?

White Paper

Free System Design on AWS E-Book

Download this early release of O'Reilly's latest cloud infrastructure e-book: System Design on AWS.

Free System Design on AWS E-Book

Start building today

Dragonfly is fully compatible with the Redis ecosystem and requires no code changes to implement.