How to recover data when redis crashes?

After Redis crashes, data can be recovered through the following methods:

1. Recovering with AOF Files: Redis can save every operation in an AOF (Append Only File) file, so when Redis restarts, it can replay the commands in the AOF file to restore the data. You can enable AOF persistence in Redis by setting the appendonly parameter to yes in the configuration file.
2. Redis can also recover data using RDB files. These files, known as Redis Database files, store Redis data in a binary format, allowing for data retrieval upon Redis restart. By configuring the save parameter in the Redis configuration file, one can establish rules for saving RDB files.
3. Using a Redis cluster for data recovery: With a Redis cluster, data from a crashed node can be recovered using backup data from other nodes in the cluster. Redis cluster spreads data across different nodes, so in the event of one node crashing, data recovery can be achieved through data replication from other nodes.
4. Restoring Redis from backup: Regularly backup Redis and store the backup files in a secure location. In the event of a Redis failure, the backup files can be used to restore the data. It is important to ensure data consistency and integrity when performing data recovery to avoid data loss or corruption. Additionally, regular backups and monitoring of Redis’s operational status are also crucial to promptly identify and address any issues with Redis failures.