Redis 存储、查询
keys 支持正则匹配，但是Redis官网建议不要在prod环境使用这个命令，会降低性能。Warning: consider KEYS as a command that should only be used in production environments with extreme care. It may ruin performance when it is executed against large databases. This command is intended for debugging and special operations, such as changing your keyspace layout. Don't use KEYS in your regular application code. If you're looking for a way to find keys in a subset of your keyspace, consider using SCAN or sets.
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