How can I change how many jobs run in parallel?

By default, Valohai will try to run as many parallel jobs as possible. Your executions get queued when you launch several executions or a Task, and as soon as a machine becomes available it's picked up.

There are a few things that might impact how many parallel executions you can run:

1. Your organization's cloud quota. Each cloud provider has a quota that determines how many machines of a certain machine family can be run at a time. Your quota might be limited, especially with large GPU machines. Read more about
   1. AWS quota at https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/ec2-resource-limits.html
   2. GCP quota at https://cloud.google.com/compute/quotas
   3. Azure quota at https://docs.microsoft.com/en-us/azure/azure-portal/supportability/per-vm-quota-requests
2. Your Valohai organization's scaling settings can be set to allow a lower per-user quota. Read more about Valohai scaling settings at Manage access and quotas for different environments
3. The cloud provider might be having availability issues on the environment type you specified. This happens every once in a while, especially with larger GPU instances.

In case you want to decrease the number of parallel jobs you can run, you can either:

• When creating a Task specify the Maximum queued executions count to limit the number of parallel jobs.
• Set a per-user quota for your environments under your organization settings.