Question 1

How do I refresh a lock in redislock?

Accepted Answer

Use the Refresh method on the lock object, passing the context and new TTL duration. This is shown in the example where lock.Refresh extends the lock for another 100 milliseconds to prevent expiration during long tasks.

Question 2

Does redislock automatically retry if a lock is not obtained?

Accepted Answer

No, it does not. The Obtain method is non-blocking and returns ErrNotObtained immediately. You need to implement your own retry logic with backoff, as suggested in the code comments for handling errors.

Question 3

What's the difference between redislock and redsync?

Accepted Answer

redislock is simpler and more minimalistic, focusing on basic locking with a clean API, while redsync often includes features like multi-master support and might have broader community usage. Choose based on your need for simplicity versus advanced capabilities.

Question 4

How to handle long-running tasks with redislock?

Accepted Answer

Periodically call the Refresh method to extend the lock's TTL while the task runs. Use the TTL method to check remaining time and refresh before expiration to maintain lock ownership and avoid race conditions.

Question 5

Is redislock suitable for high-concurrency scenarios?

Accepted Answer

It can be, but performance depends on Redis latency and throughput. For very high concurrency, monitor Redis load and consider tuning, as each lock operation involves a network call to Redis, which could become a bottleneck.

Question 6

What happens if Redis crashes while a lock is held?

Accepted Answer

The lock will expire based on its TTL, but until Redis recovers, lock state might be lost or inconsistent. Implement application-level checks or use Redis persistence features to mitigate risks, but there's no built-in recovery mechanism.

redis-lock

What is redis-lock?

Overview

Use Cases

Best For

Related Projects

Found a gem we're missing?

Not Ideal For

Pros & Cons

Pros

Cons

Frequently Asked Questions