| # Cant-Be-Late Scheduling Problem |
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| Cloud spot instance scheduling benchmark with multiple difficulty variants. |
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| ## Variants |
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| This problem has **12 variants** combining three dimensions: |
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| | Dimension | Options | Description | |
| |-----------|---------|-------------| |
| | **Availability** | `high_availability` | 43-78% spot availability regions | |
| | | `low_availability` | 4-40% spot availability regions | |
| | | `mixed_availability` | Both high and low availability regions | |
| | **Deadline** | `tight_deadline` | 52 hours (4-hour slack) | |
| | | `loose_deadline` | 70 hours (22-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` | 70h (22h slack) | 0.20h (12 min) | High (43-78%) | |
| | `high_availability_loose_deadline_small_overhead` | 70h (22h slack) | 0.05h (3 min) | High (43-78%) | |
| | `high_availability_tight_deadline_large_overhead` | 52h (4h slack) | 0.20h (12 min) | High (43-78%) | |
| | `high_availability_tight_deadline_small_overhead` | 52h (4h slack) | 0.05h (3 min) | High (43-78%) | |
| | `low_availability_loose_deadline_large_overhead` | 70h (22h slack) | 0.20h (12 min) | Low (4-40%) | |
| | `low_availability_loose_deadline_small_overhead` | 70h (22h slack) | 0.05h (3 min) | Low (4-40%) | |
| | `low_availability_tight_deadline_large_overhead` | 52h (4h slack) | 0.20h (12 min) | Low (4-40%) | |
| | `low_availability_tight_deadline_small_overhead` | 52h (4h slack) | 0.05h (3 min) | Low (4-40%) | |
| | `mixed_availability_loose_deadline_large_overhead` | 70h (22h slack) | 0.20h (12 min) | Mixed | |
| | `mixed_availability_loose_deadline_small_overhead` | 70h (22h slack) | 0.05h (3 min) | Mixed | |
| | `mixed_availability_tight_deadline_large_overhead` | 52h (4h slack) | 0.20h (12 min) | Mixed | |
| | `mixed_availability_tight_deadline_small_overhead` | 52h (4h slack) | 0.05h (3 min) | Mixed | |
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| ## Region Details |
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| **High Availability Regions** (43-78% spot availability): |
| - `us-west-2b_k80_1` (77.5%) |
| - `us-west-2b_v100_8` (66.3%) |
| - `us-west-2a_v100_8` (62.8%) |
| - `us-west-2b_v100_1` (43.2%) |
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| **Low Availability Regions** (4-40% spot availability): |
| - `us-west-2a_k80_8` (40.3%) |
| - `us-west-2b_k80_8` (39.1%) |
| - `us-west-2a_v100_1` (30.3%) |
| - `us-west-2a_k80_1` (4.3%) |
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| ## Directory Structure |
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| ``` |
| cant_be_late/ |
| ├── common/ # Shared evaluator code |
| │ ├── __init__.py # Region and config definitions |
| │ ├── run_evaluator.py # Main evaluation logic |
| │ ├── cbl_evaluator.py # Core simulation evaluator |
| │ ├── sim_worker.py # Simulation worker |
| │ ├── cant-be-late-simulator/ # Simulator code |
| │ └── real_traces.tar.gz # Trace data (extracted by set_up_env.sh) |
| ├── {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: 48 hours |
| - On-demand price: ~$3.06/hr |
| - Spot price: ~$0.97/hr |
| - Time limit: 300 seconds |
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