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# @package _global_
# example hyperparameter optimization of some experiment with Optuna:
# python train.py -m hparams_search=mnist_optuna experiment=example
defaults:
- override /hydra/sweeper: optuna
# choose metric which will be optimized by Optuna
# make sure this is the correct name of some metric logged in lightning module!
optimized_metric: "val/acc_best"
# here we define Optuna hyperparameter search
# it optimizes for value returned from function with @hydra.main decorator
# docs: https://hydra.cc/docs/next/plugins/optuna_sweeper
hydra:
sweeper:
_target_: hydra_plugins.hydra_optuna_sweeper.optuna_sweeper.OptunaSweeper
# storage URL to persist optimization results
# for example, you can use SQLite if you set 'sqlite:///example.db'
storage: null
# name of the study to persist optimization results
study_name: null
# number of parallel workers
n_jobs: 1
# 'minimize' or 'maximize' the objective
direction: maximize
# total number of runs that will be executed
n_trials: 25
# choose Optuna hyperparameter sampler
# docs: https://optuna.readthedocs.io/en/stable/reference/samplers.html
sampler:
_target_: optuna.samplers.TPESampler
seed: 12345
n_startup_trials: 10 # number of random sampling runs before optimization starts
# define range of hyperparameters
search_space:
datamodule.batch_size:
type: categorical
choices: [32, 64, 128]
model.lr:
type: float
low: 0.0001
high: 0.2
model.lin1_size:
type: categorical
choices: [32, 64, 128, 256, 512]
model.lin2_size:
type: categorical
choices: [32, 64, 128, 256, 512]
model.lin3_size:
type: categorical
choices: [32, 64, 128, 256, 512]
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