How is data and configuration backup implemented in Kubernetes?

In Redis, data is stored using two main mechanisms:

1. RDB (Redis Database Backup) — creating snapshots of the database at specific points in time. Redis saves all data into a binary file (usually dump.rdb). This method is efficient in size and suitable for backups, but data can be lost between the last snapshot and a crash.

2. AOF (Append Only File) — a log of all write operations performed by Redis. Each write command is added to the log file, allowing the state to be reconstructed upon restart by replaying all operations. This method provides higher reliability but the file can be larger and requires periodic compaction.

In Redis configuration, both methods can be enabled simultaneously for a balance between performance and reliability.

Example configuration in redis.conf:

save 900 1       # save a snapshot if at least 1 write occurs within 900 seconds
appendonly yes   # enable AOF

Thus, data storage in Redis is implemented through periodic snapshots and/or operation logging.