Suggest an editImprove this articleRefine the answer for “What are the advantages of asynchronous replication?”. Your changes go to moderation before they’re published.Approval requiredContentWhat you’re changing🇺🇸EN🇺🇦UAPreviewTitle (EN)Short answer (EN)The advantages of asynchronous replication in Redis are mainly performance, simplicity, and scalability: the master doesn't wait for a response from replicas and confirms the write right away, and replicas can be used for reads with no load on the primary node. **Key point:** even if one replica is unavailable or lagging, the master keeps running without interruption, and replicas can connect and catch up later - Redis sends the missing data on its own; the price for this is that the most recent writes can be lost if the master fails.Shown above the full answer for quick recall.Answer (EN)ImageThe advantages of **asynchronous replication** in Redis are mostly about performance, simplicity, and scalability. ### 1. High write speed The master doesn't wait for a response from replicas, it confirms a write right after performing it. That minimizes latency and makes write operations as fast as possible. ### 2. Read scaling Since replicas catch up with the master independently, they can be used for lots of **reads** with no load on the primary node. That lets the system serve a large number of clients and read requests. ### 3. A simple architecture An asynchronous scheme requires no complex acknowledgment protocols or timeouts. It's easy to set up and works well "out of the box". ### 4. A stable master Even if one of the replicas is unreachable or lagging, the master keeps running without interruption. Replication doesn't block the primary database. ### 5. Flexibility during failures Replicas can connect and catch up with the master later, Redis sends the missing data on its own. That's convenient during temporary network drops or node restarts. **Summary:** Asynchronous replication makes Redis fast, scalable, and resilient to temporary failures, at the cost of some reliability (the most recent writes can be lost if the master crashes).For the reviewerNote to the moderator (optional)Visible only to the moderator. Helps review go faster.