Architecture
Runner pool
Quick answer
A runner pool is a set of runner instances kept ready so queued jobs can start without waiting for a machine to boot.
A runner pool is a set of runner instances kept ready so queued jobs can start without waiting for a machine to boot.
Why it matters
Warm pools trade a little idle cost for a large reduction in cold start. Getting the size right is the core scheduling problem of a managed runner platform.
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Related
Control planeThe control plane is the part of a system that makes scheduling and configuration decisions, as distinct from the data plane that executes the work.Data planeThe data plane is the part of a system that executes the actual workload — in CI, the runners that check out code and run your steps.Ephemeral storageEphemeral storage is disk attached to a runner for the duration of a job and wiped when the job ends.Standby diskA standby disk is a pre-warmed volume holding a prepared runner filesystem so a job can start without provisioning storage.