Database replication is a technique where copies of data are maintained across multiple servers, with one designated as the primary database handling write operations and others as replicas handling read operations; this architecture provides backup protection, faster read performance, and high availability by allowing a replica to become the new primary if the primary server crashes, ensuring continuous application availability.
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Server Crash Avoidance | Explained in 60 seconds #shorts #interview #coding #systemdesign #interview追加:
How does Instagram survive server crashes? The answer is replication.
Replication means keeping copies of same data on multiple servers. One database becomes primary, other becomes replicas.
Usually, writes go to primary and reads go to replicas. Here are some of the benefits. It provides [music] backup protection, faster reads, high availability, and much more. [music] If primary crashes, a replica can become new primary. That's how modern apps stay alive 24/7. If you want to know in detail about the basics of database, refer to this database crash course video, and make sure you subscribe to the channel.
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