OAR 3

Status: 3.0.0-1

Released date: Jul 21, 2025

OAR 3 a new version with better code architecture and new internal structure for scheduling.

• Same design architecture as OAR2 (based on high level components)
• Low source line number of code, under 30K (core under 20kloc)
• New more scalable scheduler (based on new data structures)
• Python 3.7
• Better development tools
• Unit test

• Production version (3.0.0-1): Jul 21th 2025
• Beta version: 4Q23 29th 2023
• Alpha version (3.0.0dev4): Mar 9th 2020
• Pre-Alpha version (3.0.0dev3): Nov 12th 2018
  • Version to evaluate robustness of core functions
  • UI needs some cleaning

Note: Delays in previous roadmap are due to works around Batsim a simulator of infrastructures and Nixos-Compose.

• Core sheduler in Rust (Oar-Scheduler-Redox)
• Dynamic/evolving Jobs (see branch envelope3)

See documentation

• Plugins for scheduling
• Temporal Quotas (time depend, recurrent and one-shoted periods)
• Extended fair-share policies
• Various bugs fix
• Multi-target testing/dev: docker-compose, VM and Grid'5000 thanks to Nixos-Compose.

• All core features are written
• Scheduling part ready at 90% (fully operational)
• Need OAR2 installation procedure to function
• Incomplete CLI, few options available
• Not all design/architecture choices are fixed
• Nodes energy saving unfinished
• Pingchecker unavailable
• SendMail to user unavailable
• Test coverage 70%-80%

• Standalone procedure installation
• Complete CLI commands
• Test coverage 80%-90%
• API REST following OpenAPI 3.0 specification
• Extended Faire Share scheduling
• Calendar scheduling
• Additional customization points
• Plugins mechanism for scheduling functions
• Better scalability

• Version usable by our early adopters
• Pre-production version
• Documentation
• Test coverage >90%