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A Unique Index enforces distinct values in a column, preventing duplicates while speeding up queries. It's ideal for fields like email or username, ensuring data accuracy with minimal impact on read performance.
System-design
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A checksum is a fixed-length string from a cryptographic hash that verifies data integrity in distributed systems. It helps detect corruption during data transfer, ensuring clients receive error-free data or can request a clean copy.- Published on
Learn what a Distributed File System is, how it works, its key features, examples like HDFS and GFS, and common use cases such as cloud storage and big data processing.- Published on
Redundancy in systems means having backup components to prevent failures. Learn how it boosts reliability, availability, and disaster recovery in modern IT infrastructure.- Published on
Learn about primary-replica, primary-primary, multi-master, read-replica, snapshot, and hybrid database replication methods. Compare benefits and challenges to pick the right strategy.