Daniel Belenky created OVIRT-2782:
-------------------------------------
Summary: Configure Jenkins to wait less and allocate more
Key: OVIRT-2782
URL: https://ovirt-jira.atlassian.net/browse/OVIRT-2782
Project: oVirt - virtualization made easy
Issue Type: Improvement
Reporter: Daniel Belenky
Assignee: infra
By default, Jenkins is configured to wait a few seconds before allocating a new
node in a hope that a node in use to be freed. We can control this setting by
setting `hudson.slaves.NodeProvisioner.initialDelay` to `0`. But, because
Jenkins computes the excess workload value (which decides if we need to
allocate a new node) using an EMA, we also can control it's margins to lower
its threshold so that Jenkins will allocate nodes faster and in advance.
The recommended settings by the k8s plugin to spawn a node for every build in
the queue:
```
By default, Jenkins is configured to wait a few seconds before allocating a new
node in a hope that a node in use to be freed. We can control this setting by
setting `hudson.slaves.NodeProvisioner.initialDelay` to `0`. But, because
Jenkins computes the excess workload value (which decides if we need to
allocate a new node) using an EMA, we also can lower its threshold so that
Jenkins will allocate nodes faster and in advance.
```
-Dhudson.slaves.NodeProvisioner.initialDelay=0
-Dhudson.slaves.NodeProvisioner.MARGIN=50
-Dhudson.slaves.NodeProvisioner.MARGIN0=0.85
```
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