Are redis operations atomic?

Atomic operations: INCR, DECR, INCRBY, DECRBY, GETSET, SETNX. They are uninterruptible and either execute completely or not at all. Non-atomic operations: SET, SETEX, DEL. They may be interrupted, causing data inconsistency. Atomicity is crucial to guarantee data consistency, especially when multiple clients access the same data at the same time.

Atomicity of Redis operations

Redis provides a variety of operations, but only some of them are atomic .

Atomic operations

Atomic operations refer to uninterruptible operations, which means that the operation is either completely executed or not executed at all, with no intermediate state in between. Atomic operations supported in Redis include:

• INCR
• DECR
• INCRBY
• DECRBY
• GETSET
• SETNX

These operations are guaranteed not to be interrupted by other operations during execution.

Non-atomic operations

The following operations in Redis are not atomic operations:

• SET
• SETEX
• SETNX
• DEL

These operations may be interrupted by other operations, resulting in data inconsistency.

Importance of Atomicity

Atomicity in Redis is crucial to ensure data consistency. Atomic operations prevent data corruption or loss when multiple clients access the same data item simultaneously.

Notes on non-atomic operations

When using non-atomic operations, you must pay attention to the following:

• Data may be performing operations changes occur in the process.
• Before and after performing operations, steps should be taken to verify data consistency.
• Avoid using non-atomic operations in highly competitive environments.

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