Configuration

This page explain how to further configure the Judgels deployment.

These configs are available in vars.yml.

Java JVM options

Uncomment the following lines to set JVM options for the judgels server and grader apps:

# java_opts_judgels_server: -Xmx1g
# java_opts_judgels_grader: -Xmx1g

For example:

java_opts_judgels_server: -Xms512m -Xmx1g

User session limits

• jophiel_session_maxConcurrentSessionsPerUser
  • Max number of allowed concurrent sessions (logins) per user. Set to -1 for unlimited number.
• jophiel_session_disableLogout
  • Whether to disable logout.

For example, in an on-site contest setting, we can set the following combination to disallow remote login and to prevent logout:

• jophiel_session_maxConcurrentSessionsPerUser: 1
• jophiel_session_disableLogout: true

Grading worker threads per machine

By default, there will be one worker threads per grader VM:

• gabriel_grading_numWorkerThreads: 1

If the number of CPUs in each of the grader VMs is lower/higher, we can set a different number appropriately, e.g.:

• gabriel_grading_numWorkerThreads: 2

It means that each grader VM can have 2 concurrent grading executions.

Redeploying Judgels

After updating vars.yml, to actually apply the new configuration, run the following in deployment/ansible:

ansible-playbook -e @env/vars.yml playbooks/deploy.yml --tags=config