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Encapsulation Daemon Callback

Source: R/mlr_callbacks.R
mlr3automl.encapsulation_daemon.Rd

This mlr3misc::Callback starts a persistent mirai daemon on each rush worker that is reused for the "mirai" encapsulation of the tuned learners. Reusing a single daemon avoids the overhead of starting a new daemon for every learner evaluation. The daemon is started when the worker begins and its liveness is checked before every evaluation. If the daemon has died, it is restarted.

Parameters

  • n_daemons :: integer(1)
    Number of daemons to start on each worker. Defaults to 1.

Examples

clbk("mlr3automl.encapsulation_daemon", n_daemons = 1)
#> <CallbackAsyncTuning:mlr3automl.encapsulation_daemon>: Encapsulation Daemon Callback
#> * Active Stages: on_worker_end, on_optimizer_before_eval,
#>   on_worker_begin