Common Workflows
This section documents typical ocean modeling workflows and best practices using Rompy. For basic workflow concepts, please see the User Guide and Progressive Tutorials.
Common Workflow Patterns
1. Standard Model Simulation
The most common workflow for running a single model simulation:
- Define spatial and temporal domain
- Configure model-specific parameters
- Set up data sources and boundary conditions
- Validate configuration
- Generate input files
- Execute model run
- Post-process results
2. Multi-Model Coupling
For complex simulations involving multiple models:
- Configure individual model components
- Set up data exchange between models
- Define execution sequence or coupling mechanism
- Execute coupled system
- Validate consistency between models
3. Ensemble Simulations
Running multiple simulations with varying parameters:
- Define base configuration
- Set up parameter ranges for ensemble
- Generate configurations for each ensemble member
- Execute ensemble runs
- Aggregate and analyze results
4. Operational Forecasting
For routine model runs such as weather forecasting:
- Establish automated data acquisition pipeline
- Configure model for operational constraints
- Set up regular execution schedule
- Implement monitoring and alerting
- Archive and catalog results
5. Sensitivity Analysis
Systematically varying parameters to understand model behavior:
- Define parameter space to explore
- Generate configurations for each parameter combination
- Execute all model runs
- Analyze outputs for parameter sensitivity
- Document findings and recommendations
Best Practices
Configuration Management
- Use version control for model configurations
- Maintain separate configurations for development, testing, and production
- Document configuration parameters and their impacts
- Perform validation checks before execution
- Use configuration factories for complex setups
Execution Management
- Use appropriate backends for computational requirements
- Monitor resource usage during execution
- Implement proper error handling and recovery
- Log execution details for debugging and audit
- Plan for potential failures and implement retry mechanisms
Data Management
- Use consistent data formats and conventions
- Implement data quality checks
- Maintain data lineage and provenance
- Plan for long-term data storage and access
- Consider data caching strategies for repeated access
Model Validation
- Compare model output with observations when available
- Document model limitations and uncertainties
- Perform sensitivity analysis on key parameters
- Validate model physics for specific applications
- Establish validation metrics and acceptance criteria
Integration Patterns
Pattern 1: Data Pipeline Integration
Integrating Rompy with existing data pipelines:
# Example: Integration with intake catalog for data acquisition
from rompy.core.source import SourceIntake
# Configure data source from catalog
data_source = SourceIntake(
catalog="https://catalog.example.com/model_data.yml",
entry="gfs_forecast",
)
# Use in model configuration
# model_config.data = data_source
Pattern 2: Monitoring Integration
Integrating with monitoring systems:
# Example: Logging model execution metrics
import logging
from rompy.model import ModelRun
# Setup logger
logger = logging.getLogger(__name__)
def run_monitored_model(config):
model_run = ModelRun(**config)
# Log execution start
logger.info(f"Starting model run: {model_run.run_id}")
try:
# Execute model
success = model_run.run(backend=config['backend'])
# Log execution result
if success:
logger.info(f"Model run {model_run.run_id} completed successfully")
else:
logger.error(f"Model run {model_run.run_id} failed")
return success
except Exception as e:
logger.error(f"Model run {model_run.run_id} encountered error: {e}")
raise
Pattern 3: Error Recovery
Implementing error recovery mechanisms:
# Example: Retry mechanism for model execution
def run_with_retry(model_run, backend, max_retries=3):
for attempt in range(max_retries):
try:
success = model_run.run(backend=backend)
if success:
return True
else:
logger.warning(f"Attempt {attempt + 1} failed")
except Exception as e:
logger.warning(f"Attempt {attempt + 1} encountered error: {e}")
if attempt < max_retries - 1:
logger.info(f"Retrying in 30 seconds... (attempt {attempt + 2})")
time.sleep(30)
return False
Troubleshooting Common Issues
Issue 1: Configuration Validation Failure
Symptoms: Model configuration fails with validation errors
Solution:
1. Check field names and value types against API documentation
2. Ensure required fields are provided
3. Verify value ranges and constraints
4. Use model's model_dump() method to inspect configuration
Issue 2: Execution Backend Issues
Symptoms: Model fails to execute or hangs during execution
Solutions: 1. Check backend configuration parameters 2. Verify resource availability (CPU, memory, disk space) 3. Ensure model executable is accessible and has proper permissions 4. Check for network connectivity issues (for Docker/cloud backends)
Issue 3: Data Access Problems
Symptoms: Model fails during data acquisition or processing
Solutions: 1. Verify data source URIs and access credentials 2. Check network connectivity to remote data sources 3. Validate data format and structure against expectations 4. Ensure sufficient local storage for data caching
Performance Optimization
Resource Management
- Right-size computational resources for your model requirements
- Consider using Docker for consistent environments
- Use parallel processing where possible for ensemble runs
- Optimize I/O operations when dealing with large datasets
Configuration Optimization
- Pre-generate configurations to avoid runtime overhead
- Use appropriate grid resolutions for your application
- Optimize data access patterns and caching
- Profile model execution to identify bottlenecks
Next Steps
- For specific model examples, see Examples
- For model configuration details, see Configuration Deep Dive
- For backend options, see Backends
- For API reference, see API Reference
- For model-specific guides, see Models