Throttle or ???

[jfmatth]

What an amazing project, thank you for sharing this.

I'm very interested to see if chancy can be setup to run jobs on a throttle. What I mean is, I need to run a job every but due to licensing etc. that interval can't be more than some within a time period?

the job might only take 1s to run, but I would like chancy to limit how often it runs based on some 'throttle' we define.

hope this makes sense.

this is a very very cool project :)

[TkTech]

Heya! There's a few options depending on your needs.

Per-job, partitioned rate limits (#11) is coming with v0.26 in #58, but given the scope of that release it may be a bit. Until then, queues are cheap, and queues support global rate limiting. So you could do:

async with Chancy("postgresql://localhost/postgres") as chancy:
    await chancy.declare(
        Queue(name="my_rate_limited_queue", rate_limit=10, rate_limit_window=60)
    )

If this is just one task, you could also add a strong guarantee to prevent duplicates using with_unique_key, which will only allow one of that job to ever run at the same time.

And if it's more like "once a day at 5PM" you can use the Cron plugin, which supports job schedules and ensures duplicates never run.

[jfmatth]

Awesome thanks.

I saw the per-queue rate limit and figured that would suffice.

Looking forward to .26. Again, great project