Laravel - What is difference between reserved_at and available_at on Jobs table?

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I already try to find out in Google and Laravel Documentation. But hard to find what difference between

reserved_at
available_at

Can anyone explain what the meaning of that column?

laravel background-process queue
1 Answers

available_at is when the job can be processed (delay). This field is set at creation at current time by default.

reserved_at is set if a worker has reserved the job so it doesn't overlap with other workers. Basically, so the job doesn't run twice in a parallel fashion by two different workers(process).This field is null at creation.

If you want to deep dive a bit, here is the DatabaseQueue.php that uses the fields.

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