| # Cant-Be-Late Scheduling Problem | |
| Cloud spot instance scheduling benchmark with multiple difficulty variants. | |
| ## Variants | |
| This problem has **12 variants** combining three dimensions: | |
| | 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 | | |
| ### Variant Examples | |
| | 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 | | |
| ## Region Details | |
| **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%) | |
| **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%) | |
| ## Directory Structure | |
| ``` | |
| 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 | |
| ``` | |
| ## Common Parameters | |
| All variants share: | |
| - Task duration: 48 hours | |
| - On-demand price: ~$3.06/hr | |
| - Spot price: ~$0.97/hr | |
| - Time limit: 300 seconds | |