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Charles Liu

09/25/2024, 9:29 PM

@Marvin how do I set global concurrency limits in my prefect.yaml for v3?

Marvin

09/25/2024, 9:30 PM

In Prefect 3.x, you can set global concurrency limits through the Prefect CLI using the

prefect gcl

command rather than directly in the

prefect.yaml

file. Here are the main commands you can use: 1. Create a New Concurrency Limit:

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prefect gcl create my-concurrency-limit --limit 5 --slot-decay-per-second 1.0

2. Inspect a Concurrency Limit:

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prefect gcl inspect my-concurrency-limit

3. Update a Concurrency Limit:

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prefect gcl update my-concurrency-limit --limit 10

4. Delete a Concurrency Limit:

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prefect gcl delete my-concurrency-limit

To see all available commands and options, run:

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prefect gcl --help

For more details, refer to the documentation on global concurrency limits. Additionally, here are some related discussions and updates on GitHub: - Tutorial section docs updates If you have further questions or need specific examples, let me know!

Marvin

09/25/2024, 9:30 PM

In Prefect 3.0, you can set global rate limits to manage the frequency of requests or operations and ensure system stability. This can be particularly useful for preventing overuse, ensuring fairness, and handling errors gracefully. To define global rate limits in your

prefect.yaml

file, you'll need to follow these general steps: 1. Initialize your deployment configuration: Run the CLI command

prefect init

in the directory or repository that stores your flow code. This will create a

prefect.yaml

file if it doesn't already exist. 2. Configure Global Concurrency Limits: You can define global concurrency and rate limits directly within the Prefect UI, CLI, or Python SDK. The configuration involves specifying parameters like the name of the limit, the maximum number of slots (concurrency limit), and slot decay per second (for rate limits). Here's a basic example of how your

prefect.yaml

might look like when configuring global concurrency limits:

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yaml
concurrency_limits:
  - name: "my_global_limit"
    limit: 5  # The maximum number of concurrent operations
    decay: 1  # Controls the rate at which slots are released
    active: true  # Whether or not the limit is active

### Example Steps 1. Initialize Configuration:

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prefect init

2. Modify
prefect.yaml
File:

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yaml
   concurrency_limits:
     - name: "global_rate_limit"
       limit: 10
       decay: 0.1
       active: true

### References: For more details, you can visit: - Global Concurrency and Rate Limits: link - Prefect YAML Deployment: link Feel free to adjust the specifics according to your use case. If you encounter any issues or need further assistance, let me know!

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