| # Cant-Be-Late Multi-Region Scheduling Problem |
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| Multi-region cloud spot instance scheduling benchmark with multiple difficulty variants. |
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| ## Variants |
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| This problem has **8 variants** combining three dimensions: |
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| | 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 | |
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| ### Variant Examples |
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| | 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 | |
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| ## Multi-Region Feature |
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| 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 |
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| ## Evaluation Scenarios |
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| **Stage 1**: Quick check on 2-region scenario (must pass to proceed) |
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| **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) |
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| ## Directory Structure |
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| ``` |
| 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 |
| ``` |
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| ## Common Parameters |
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| 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 |
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