| # Cant-Be-Late Multi-Region Scheduling Problem | |
| Multi-region cloud spot instance scheduling benchmark with multiple difficulty variants. | |
| ## Variants | |
| This problem has **8 variants** combining three dimensions: | |
| | Dimension | Options | Description | | |
| |-----------|---------|-------------| | |
| | **Availability** | `high_availability` | East coast regions with good spot availability | | |
| | | `low_availability` | West coast regions with lower spot availability | | |
| | **Deadline** | `tight_deadline` | 36 hours (12-hour slack) | | |
| | | `loose_deadline` | 48 hours (24-hour slack) | | |
| | **Overhead** | `small_overhead` | 0.05 hours (3 minutes) restart overhead | | |
| | | `large_overhead` | 0.20 hours (12 minutes) restart overhead | | |
| ### Variant Examples | |
| | Variant | Deadline | Overhead | Regions | | |
| |---------|----------|----------|---------| | |
| | `high_availability_loose_deadline_large_overhead` | 48h (24h slack) | 0.20h (12 min) | East coast | | |
| | `high_availability_loose_deadline_small_overhead` | 48h (24h slack) | 0.05h (3 min) | East coast | | |
| | `high_availability_tight_deadline_large_overhead` | 36h (12h slack) | 0.20h (12 min) | East coast | | |
| | `high_availability_tight_deadline_small_overhead` | 36h (12h slack) | 0.05h (3 min) | East coast | | |
| | `low_availability_loose_deadline_large_overhead` | 48h (24h slack) | 0.20h (12 min) | West coast | | |
| | `low_availability_loose_deadline_small_overhead` | 48h (24h slack) | 0.05h (3 min) | West coast | | |
| | `low_availability_tight_deadline_large_overhead` | 36h (12h slack) | 0.20h (12 min) | West coast | | |
| | `low_availability_tight_deadline_small_overhead` | 36h (12h slack) | 0.05h (3 min) | West coast | | |
| ## Multi-Region Feature | |
| Unlike single-region cant_be_late, this problem allows: | |
| - Switching between multiple AWS regions at each timestep | |
| - Each region has different spot availability patterns | |
| - Switching regions forces a restart overhead | |
| ## Evaluation Scenarios | |
| **Stage 1**: Quick check on 2-region scenario (must pass to proceed) | |
| **Stage 2**: Full evaluation on multiple scenarios: | |
| - 2 zones same region (8 traces) | |
| - 2 regions east-west (8 traces) | |
| - 3 regions diverse (6 traces) | |
| - 3 zones same region (6 traces) | |
| - 5 regions high diversity (4 traces) | |
| - All 9 regions (2 traces) | |
| ## Directory Structure | |
| ``` | |
| cant_be_late_multi/ | |
| ├── common/ # Shared evaluator code | |
| │ ├── __init__.py # Configuration definitions | |
| │ ├── run_evaluator.py # Main evaluation logic | |
| │ └── cant-be-late-simulator/ # Simulator with multi-region support | |
| ├── {variant}/ # Each variant directory | |
| │ ├── evaluator.py # Thin wrapper importing from common/ | |
| │ ├── readme # Problem specification and API | |
| │ ├── config.yaml # Variant configuration | |
| │ └── resources/ # Resources for evaluation | |
| └── README.md # This file | |
| ``` | |
| ## Common Parameters | |
| All variants share: | |
| - Task duration: 24 hours | |
| - On-demand price: ~$3.06/hr | |
| - Spot price: ~$0.97/hr | |
| - Time limit: 300 seconds | |
| - 9 available AWS regions | |