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Roadmap to becoming a developer in 2022
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developer-roadmap/src/data/roadmaps/redis/content/how-rdb-works@D3pZdAjwPFMRx...

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How RDB Works?

The RDB (Redis Database Backup) mechanism in Redis creates snapshots of the dataset at specified intervals and saves them to disk as a compact binary file. This process is triggered manually, via the SAVE or BGSAVE commands, or automatically based on predefined conditions. During a snapshot, Redis forks a child process to write the in-memory data to the RDB file, ensuring that the main process is not blocked. While RDB offers a lightweight and fast backup option, it may lead to potential data loss if Redis crashes between snapshots, making it ideal for periodic backups rather than real-time persistence.

Learn more from the following resources: