openevolve/configs/island_config_example.yaml at 84b58458943aa48c636deb42130df84b7f8985c9 · algorithmicsuperintelligence/openevolve · GitHub

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# OpenEvolve Island-Based Evolution Configuration
# This configuration demonstrates the proper use of island-based evolution

# General settings
max_iterations: 1000
checkpoint_interval: 100
log_level: "INFO"

# LLM configuration
llm:
  primary_model: "gemini-2.0-flash-lite"
  primary_model_weight: 0.8
  secondary_model: "gemini-2.0-flash"
  secondary_model_weight: 0.2
  temperature: 0.7
  top_p: 0.95
  max_tokens: 4096

# Database configuration with proper island settings
database:
  population_size: 500
  archive_size: 100

  # Island-based evolution settings
  num_islands: 5                    # Number of separate populations
  migration_interval: 50            # Migrate every 50 generations
  migration_rate: 0.1               # Migrate 10% of top programs

  # Selection parameters
  elite_selection_ratio: 0.1
  exploration_ratio: 0.3
  exploitation_ratio: 0.7
  # Note: diversity_metric fixed to "edit_distance"

  # Feature map dimensions for MAP-Elites
  feature_dimensions: ["score", "complexity"]
  feature_bins: 10

# Prompt configuration
prompt:
  num_top_programs: 3
  num_diverse_programs: 2
  use_template_stochasticity: true

# Evaluator configuration
evaluator:
  timeout: 300
  max_retries: 3
  cascade_evaluation: true
  parallel_evaluations: 4

# Evolution settings
diff_based_evolution: true
allow_full_rewrites: false
max_code_length: 10000