The MLflow R API allows you to use MLflow Tracking <tracking/>
, Projects <projects/>
and Models <models/>
.
You can use the R API to install MLflow, start the user interface, create and list experiments, save models, run projects and serve models among many other functions available in the R API.
Table of Contents
Install MLflow
Installs auxiliary dependencies of MLflow (e.g. the MLflow CLI). As a one-time setup step, you must run install_mlflow() to install these dependencies before calling other MLflow APIs.
install_mlflow(python_version = "3.7")
Argument | Description |
---|---|
python_version |
Optional Python version to use within conda environment created for installing the MLflow CLI. If unspecified, defaults to using Python 3.6 |
install_mlflow() requires Python and Conda to be installed. See https://www.python.org/getit/ and https://docs.conda.io/projects/conda/en/latest/user-guide/install/ .
Alternatively, you can set MLFLOW_PYTHON_BIN and MLFLOW_BIN environment variables instead. MLFLOW_PYTHON_BIN should point to python executable and MLFLOW_BIN to mlflow cli executable. These variables allow you to use custom mlflow installation. Note that there may be some compatibility issues if the custom mlflow version does not match the version of the R package.
library(mlflow)
install_mlflow()
Initialize an MLflow Client
Initializes and returns an MLflow client that communicates with the tracking server or store at the specified URI.
mlflow_client(tracking_uri = NULL)
Argument | Description |
---|---|
tracking_uri |
The tracking URI. If not provided, defaults to the service set by mlflow_set_tracking_uri() . |
Create Experiment
Creates an MLflow experiment and returns its id.
mlflow_create_experiment(
name,
artifact_location = NULL,
client = NULL,
tags = NULL
)
Argument | Description |
---|---|
name |
The name of the experiment to create. |
artifact_location |
Location where all artifacts for this experiment are stored. If not provided, the remote server will select an appropriate default. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
tags |
Experiment tags to set on the experiment upon experiment creation. |
Create a model version
Create a model version
mlflow_create_model_version(
name,
source,
run_id = NULL,
tags = NULL,
run_link = NULL,
description = NULL,
client = NULL
)
Argument | Description |
---|---|
name |
Register model under this name. |
source |
URI indicating the location of the model artifacts. |
run_id |
MLflow run ID for correlation, if source was generated by an experiment run in MLflow Tracking. |
tags |
Additional metadata. |
run_link |
MLflow run link - This is the exact link of the run that generated this model version. |
description |
Description for model version. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Create registered model
Creates a new registered model in the model registry
mlflow_create_registered_model(
name,
tags = NULL,
description = NULL,
client = NULL
)
Argument | Description |
---|---|
name |
The name of the model to create. |
tags |
Additional metadata for the registered model (Optional). |
description |
Description for the registered model (Optional). |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Delete Experiment
Marks an experiment and associated runs, params, metrics, etc. for deletion. If the experiment uses FileStore, artifacts associated with experiment are also deleted.
mlflow_delete_experiment(experiment_id, client = NULL)
Argument | Description |
---|---|
experiment_id |
ID of the associated experiment. This field is required. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Delete a model version
Delete a model version
mlflow_delete_model_version(name, version, client = NULL)
Argument | Description |
---|---|
name |
Name of the registered model. |
version |
Model version number. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Delete registered model
Deletes an existing registered model by name
mlflow_delete_registered_model(name, client = NULL)
Argument | Description |
---|---|
name |
The name of the model to delete |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Delete a Run
Deletes the run with the specified ID.
mlflow_delete_run(run_id, client = NULL)
Argument | Description |
---|---|
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Delete Tag
Deletes a tag on a run. This is irreversible. Tags are run metadata that can be updated during a run and after a run completes.
mlflow_delete_tag(key, run_id = NULL, client = NULL)
Argument | Description |
---|---|
key |
Name of the tag. Maximum size is 255 bytes. This field is required. |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Download Artifacts
Download an artifact file or directory from a run to a local directory if applicable, and return a local path for it.
mlflow_download_artifacts(path, run_id = NULL, client = NULL)
Argument | Description |
---|---|
path |
Relative source path to the desired artifact. |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
End a Run
Terminates a run. Attempts to end the current active run if run_id
is not specified.
mlflow_end_run(
status = c("FINISHED", "FAILED", "KILLED"),
end_time = NULL,
run_id = NULL,
client = NULL
)
Argument | Description |
---|---|
status |
Updated status of the run. Defaults to FINISHED . Can also be set to “FAILED” or “KILLED”. |
end_time |
Unix timestamp of when the run ended in milliseconds. |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Get Experiment
Gets metadata for an experiment and a list of runs for the experiment. Attempts to obtain the active experiment if both experiment_id
and name
are unspecified.
mlflow_get_experiment(experiment_id = NULL, name = NULL, client = NULL)
Argument | Description |
---|---|
experiment_id |
ID of the experiment. |
name |
The experiment name. Only one of name or experiment_id should be specified. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Get latest model versions
Retrieves a list of the latest model versions for a given model.
mlflow_get_latest_versions(name, stages = list(), client = NULL)
Argument | Description |
---|---|
name |
Name of the model. |
stages |
A list of desired stages. If the input list is NULL, return latest versions for ALL_STAGES. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Get Metric History
Get a list of all values for the specified metric for a given run.
mlflow_get_metric_history(metric_key, run_id = NULL, client = NULL)
Argument | Description |
---|---|
metric_key |
Name of the metric. |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Get a model version
Get a model version
mlflow_get_model_version(name, version, client = NULL)
Argument | Description |
---|---|
name |
Name of the registered model. |
version |
Model version number. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Get a registered model
Retrieves a registered model from the Model Registry.
mlflow_get_registered_model(name, client = NULL)
Argument | Description |
---|---|
name |
The name of the model to retrieve. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Get Run
Gets metadata, params, tags, and metrics for a run. Returns a single value for each metric key: the most recently logged metric value at the largest step.
mlflow_get_run(run_id = NULL, client = NULL)
Argument | Description |
---|---|
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Get Remote Tracking URI
Gets the remote tracking URI.
mlflow_get_tracking_uri()
Get Run or Experiment ID
Extracts the ID of the run or experiment.
mlflow_id(object)
list(list("mlflow_id"), list("mlflow_run"))(object)
list(list("mlflow_id"), list("mlflow_experiment"))(object)
Argument | Description |
---|---|
object |
An mlflow_run or mlflow_experiment object. |
List Artifacts
Gets a list of artifacts.
mlflow_list_artifacts(path = NULL, run_id = NULL, client = NULL)
Argument | Description |
---|---|
path |
The run’s relative artifact path to list from. If not specified, it is set to the root artifact path |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
List Experiments
Gets a list of all experiments.
mlflow_list_experiments(
view_type = c("ACTIVE_ONLY", "DELETED_ONLY", "ALL"),
client = NULL
)
Argument | Description |
---|---|
view_type |
Qualifier for type of experiments to be returned. Defaults to ACTIVE_ONLY . |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
List registered models
Retrieves a list of registered models.
mlflow_list_registered_models(
max_results = 100,
page_token = NULL,
client = NULL
)
Argument | Description |
---|---|
max_results |
Maximum number of registered models to retrieve. |
page_token |
Pagination token to go to the next page based on a previous query. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
List Run Infos
Returns a tibble whose columns contain run metadata (run ID, etc) for all runs under the specified experiment.
mlflow_list_run_infos(
run_view_type = c("ACTIVE_ONLY", "DELETED_ONLY", "ALL"),
experiment_id = NULL,
client = NULL
)
Argument | Description |
---|---|
run_view_type |
Run view type. |
experiment_id |
Experiment ID. Attempts to use the active experiment if not specified. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Load MLflow Model Flavor
Loads an MLflow model using a specific flavor. This method is called internally by mlflow_load_model , but is exposed for package authors to extend the supported MLflow models. See https://mlflow.org/docs/latest/models.html#storage-format for more info on MLflow model flavors.
mlflow_load_flavor(flavor, model_path)
Argument | Description |
---|---|
flavor |
An MLflow flavor object loaded by mlflow_load_model <#mlflow-load-mod el>__ , with class loaded from the flavor field in an MLmodel file. |
model_path |
The path to the MLflow model wrapped in the correct class. |
Load MLflow Model
Loads an MLflow model. MLflow models can have multiple model flavors. Not all flavors / models can be loaded in R. This method by default searches for a flavor supported by R/MLflow.
mlflow_load_model(model_uri, flavor = NULL, client = mlflow_client())
Argument | Description |
---|---|
model_uri |
The location, in URI format, of the MLflow model. |
flavor |
Optional flavor specification (string). Can be used to load a particular flavor in case there are multiple flavors available. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
The URI scheme must be supported by MLflow - i.e. there has to be an MLflow artifact repository corresponding to the scheme of the URI. The content is expected to point to a directory containing MLmodel. The following are examples of valid model uris:
file:///absolute/path/to/local/model
file:relative/path/to/local/model
s3://my_bucket/path/to/model
runs:/<mlflow_run_id>/run-relative/path/to/model
models:/<model_name>/<model_version>
models:/<model_name>/<stage>
For more information about supported URI schemes, see the Artifacts Documentation at https://www.mlflow.org/docs/latest/tracking.html#artifact-stores.
Log Artifact
Logs a specific file or directory as an artifact for a run.
mlflow_log_artifact(path, artifact_path = NULL, run_id = NULL, client = NULL)
Argument | Description |
---|---|
path |
The file or directory to log as an artifact. |
artifact_path |
Destination path within the run’s artifact URI. |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
When logging to Amazon S3, ensure that you have the s3:PutObject, s3:GetObject, s3:ListBucket, and s3:GetBucketLocation permissions on your bucket.
Additionally, at least the AWS_ACCESS_KEY_ID
and AWS_SECRET_ACCESS_KEY
environment variables must be set to the corresponding key and secrets provided by Amazon IAM.
Log Batch
Log a batch of metrics, params, and/or tags for a run. The server will respond with an error (non-200 status code) if any data failed to be persisted. In case of error (due to internal server error or an invalid request), partial data may be written.
mlflow_log_batch(
metrics = NULL,
params = NULL,
tags = NULL,
run_id = NULL,
client = NULL
)
Argument | Description |
---|---|
metrics |
A dataframe of metrics to log, containing the following columns: “key”, “value”, “step”, “timestamp”. This dataframe cannot contain any missing (‘NA’) entries. |
params |
A dataframe of params to log, containing the following columns: “key”, “value”. This dataframe cannot contain any missing (‘NA’) entries. |
tags |
A dataframe of tags to log, containing the following columns: “key”, “value”. This dataframe cannot contain any missing (‘NA’) entries. |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Log Metric
Logs a metric for a run. Metrics key-value pair that records a single float measure. During a single execution of a run, a particular metric can be logged several times. The MLflow Backend keeps track of historical metric values along two axes: timestamp and step.
mlflow_log_metric(
key,
value,
timestamp = NULL,
step = NULL,
run_id = NULL,
client = NULL
)
Argument | Description |
---|---|
key |
Name of the metric. |
value |
Float value for the metric being logged. |
timestamp |
Timestamp at which to log the metric. Timestamp is rounded to the nearest integer. If unspecified, the number of milliseconds since the Unix epoch is used. |
step |
Step at which to log the metric. Step is rounded to the nearest integer. If unspecified, the default value of zero is used. |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Log Model
Logs a model for this run. Similar to mlflow_save_model()
but stores model as an artifact within the active run.
mlflow_log_model(model, artifact_path, ...)
Argument | Description |
---|---|
model |
The model that will perform a prediction. |
artifact_path |
Destination path where this MLflow compatible model will be saved. |
... |
Optional additional arguments passed to mlflow_save_model() when persisting the model. For example, conda_env = /path/to/conda.yaml may be passed to specify a conda dependencies file for flavors (e.g. keras) that support conda environments. |
Log Parameter
Logs a parameter for a run. Examples are params and hyperparams used for ML training, or constant dates and values used in an ETL pipeline. A param is a STRING key-value pair. For a run, a single parameter is allowed to be logged only once.
mlflow_log_param(key, value, run_id = NULL, client = NULL)
Argument | Description |
---|---|
key |
Name of the parameter. |
value |
String value of the parameter. |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Create conda env used by MLflow if it doesn’t already exist
Create conda env used by MLflow if it doesn’t already exist
mlflow_maybe_create_conda_env(python_version)
Argument | Description |
---|---|
python_version |
Python version to use within conda environment created for installing the MLflow CLI. |
Read Command-Line Parameter
Reads a command-line parameter passed to an MLflow project MLflow allows you to define named, typed input parameters to your R scripts via the mlflow_param API. This is useful for experimentation, e.g. tracking multiple invocations of the same script with different parameters.
mlflow_param(name, default = NULL, type = NULL, description = NULL)
Argument | Description |
---|---|
name |
The name of the parameter. |
default |
The default value of the parameter. |
type |
Type of this parameter. Required if default is not set. If specified, must be one of “numeric”, “integer”, or “string”. |
description |
Optional description for the parameter. |
# This parametrized script trains a GBM model on the Iris dataset and can be run as an MLflow
# project. You can run this script (assuming it's saved at /some/directory/params_example.R)
# with custom parameters via:
# mlflow_run(entry_point = "params_example.R", uri = "/some/directory",
# parameters = list(num_trees = 200, learning_rate = 0.1))
install.packages("gbm")
library(mlflow)
library(gbm)
# define and read input parameters
num_trees <- mlflow_param(name = "num_trees", default = 200, type = "integer")
lr <- mlflow_param(name = "learning_rate", default = 0.1, type = "numeric")
# use params to fit a model
ir.adaboost <- gbm(Species ~., data=iris, n.trees=num_trees, shrinkage=lr)
Generate Prediction with MLflow Model
Performs prediction over a model loaded using mlflow_load_model()
, to be used by package authors to extend the supported MLflow models.
mlflow_predict(model, data, ...)
Argument | Description |
---|---|
model |
The loaded MLflow model flavor. |
data |
A data frame to perform scoring. |
... |
Optional additional arguments passed to underlying predict methods. |
Register an external MLflow observer
Registers an external MLflow observer that will receive a register_tracking_event(event_name, data)
callback on any model tracking event such as “create_run”, “delete_run”, or “log_metric”. Each observer should have a register_tracking_event(event_name, data)
callback accepting a character vector event_name
specifying the name of the tracking event, and data
containing a list of attributes of the event. The callback should be non-blocking, and ideally should complete instantaneously. Any exception thrown from the callback will be ignored.
mlflow_register_external_observer(observer)
Argument | Description |
---|---|
observer |
The observer object (see example) |
library(mlflow)
observer <- structure(list())
observer$register_tracking_event <- function(event_name, data) {
print(event_name)
print(data)
}
mlflow_register_external_observer(observer)
Rename Experiment
Renames an experiment.
mlflow_rename_experiment(new_name, experiment_id = NULL, client = NULL)
Argument | Description |
---|---|
new_name |
The experiment’s name will be changed to this. The new name must be unique. |
experiment_id |
ID of the associated experiment. This field is required. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Rename a registered model
Renames a model in the Model Registry.
mlflow_rename_registered_model(name, new_name, client = NULL)
Argument | Description |
---|---|
name |
The current name of the model. |
new_name |
The new name for the model. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Restore Experiment
Restores an experiment marked for deletion. This also restores associated metadata, runs, metrics, and params. If experiment uses FileStore, underlying artifacts associated with experiment are also restored.
mlflow_restore_experiment(experiment_id, client = NULL)
Argument | Description |
---|---|
experiment_id |
ID of the associated experiment. This field is required. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Throws RESOURCE_DOES_NOT_EXIST
if the experiment was never created or was permanently deleted.
Restore a Run
Restores the run with the specified ID.
mlflow_restore_run(run_id, client = NULL)
Argument | Description |
---|---|
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Serve an RFunc MLflow Model
Serves an RFunc MLflow model as a local REST API server. This interface provides similar functionality to mlflow models serve
cli command, however, it can only be used to deploy models that include RFunc flavor. The deployed server supports standard mlflow models interface with /ping and /invocation endpoints. In addition, R function models also support deprecated /predict endpoint for generating predictions. The /predict endpoint will be removed in a future version of mlflow.
mlflow_rfunc_serve(
model_uri,
host = "127.0.0.1",
port = 8090,
daemonized = FALSE,
browse = !daemonized,
...
)
Argument | Description |
---|---|
model_uri |
The location, in URI format, of the MLflow model. |
host |
Address to use to serve model, as a string. |
port |
Port to use to serve model, as numeric. |
daemonized |
Makes httpuv server daemonized so R interactive sessions are not blocked to handle requests. To terminate a daemonized server, call httpuv::stopDaemonizedServer() with the handle returned from this call. |
browse |
Launch browser with serving landing page? |
... |
Optional arguments passed to mlflow_predict() . |
The URI scheme must be supported by MLflow - i.e. there has to be an MLflow artifact repository corresponding to the scheme of the URI. The content is expected to point to a directory containing MLmodel. The following are examples of valid model uris:
file:///absolute/path/to/local/model
file:relative/path/to/local/model
s3://my_bucket/path/to/model
runs:/<mlflow_run_id>/run-relative/path/to/model
models:/<model_name>/<model_version>
models:/<model_name>/<stage>
For more information about supported URI schemes, see the Artifacts Documentation at https://www.mlflow.org/docs/latest/tracking.html#artifact-stores.
library(mlflow)
# save simple model with constant prediction
mlflow_save_model(function(df) 1, "mlflow_constant")
# serve an existing model over a web interface
mlflow_rfunc_serve("mlflow_constant")
# request prediction from server
httr::POST("http://127.0.0.1:8090/predict/")
Run an MLflow Project
Wrapper for the mlflow run
CLI command. See https://www.mlflow.org/docs/latest/cli.html#mlflow-run for more info.
mlflow_run(
uri = ".",
entry_point = NULL,
version = NULL,
parameters = NULL,
experiment_id = NULL,
experiment_name = NULL,
backend = NULL,
backend_config = NULL,
no_conda = FALSE,
storage_dir = NULL
)
Argument | Description |
---|---|
uri |
A directory containing modeling scripts, defaults to the current directory. |
entry_point |
Entry point within project, defaults to main if not specified. |
version |
Version of the project to run, as a Git commit reference for Git projects. |
parameters |
A list of parameters. |
experiment_id |
ID of the experiment under which to launch the run. |
experiment_name |
Name of the experiment under which to launch the run. |
backend |
Execution backend to use for run. |
backend_config |
Path to JSON file which will be passed to the backend. For the Databricks backend, it should describe the cluster to use when launching a run on Databricks. |
no_conda |
If specified, assume that MLflow is running within a Conda environment with the necessary dependencies for the current project instead of attempting to create a new Conda environment. Only valid if running locally. |
storage_dir |
Valid only when backend is local. MLflow downloads artifacts from distributed URIs passed to parameters of type path to subdirectories of storage_dir . |
The run associated with this run.
# This parametrized script trains a GBM model on the Iris dataset and can be run as an MLflow
# project. You can run this script (assuming it's saved at /some/directory/params_example.R)
# with custom parameters via:
# mlflow_run(entry_point = "params_example.R", uri = "/some/directory",
# parameters = list(num_trees = 200, learning_rate = 0.1))
install.packages("gbm")
library(mlflow)
library(gbm)
# define and read input parameters
num_trees <- mlflow_param(name = "num_trees", default = 200, type = "integer")
lr <- mlflow_param(name = "learning_rate", default = 0.1, type = "numeric")
# use params to fit a model
ir.adaboost <- gbm(Species ~., data=iris, n.trees=num_trees, shrinkage=lr)
Save Model for MLflow
Saves model in MLflow format that can later be used for prediction and serving. This method is generic to allow package authors to save custom model types.
list(list("mlflow_save_model"), list("crate"))(model, path, model_spec = list(), ...)
mlflow_save_model(model, path, model_spec = list(), ...)
list(list("mlflow_save_model"), list("H2OModel"))(model, path, model_spec = list(), conda_env = NULL, ...)
list(list("mlflow_save_model"), list("keras.engine.training.Model"))(model, path, model_spec = list(), conda_env = NULL, ...)
list(list("mlflow_save_model"), list("xgb.Booster"))(model, path, model_spec = list(), conda_env = NULL, ...)
Argument | Description |
---|---|
model |
The model that will perform a prediction. |
path |
Destination path where this MLflow compatible model will be saved. |
model_spec |
MLflow model config this model flavor is being added to. |
... |
Optional additional arguments. |
conda_env |
Path to Conda dependencies file. |
Search Runs
Search for runs that satisfy expressions. Search expressions can use Metric and Param keys.
mlflow_search_runs(
filter = NULL,
run_view_type = c("ACTIVE_ONLY", "DELETED_ONLY", "ALL"),
experiment_ids = NULL,
order_by = list(),
client = NULL
)
Argument | Description |
---|---|
filter |
A filter expression over params, metrics, and tags, allowing returning a subset of runs. The syntax is a subset of SQL which allows only ANDing together binary operations between a param/metric/tag and a constant. |
run_view_type |
Run view type. |
experiment_ids |
List of string experiment IDs (or a single string experiment ID) to search over. Attempts to use active experiment if not specified. |
order_by |
List of properties to order by. Example: “metrics.acc DESC”. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Run MLflow Tracking Server
Wrapper for mlflow server
.
mlflow_server(
file_store = "mlruns",
default_artifact_root = NULL,
host = "127.0.0.1",
port = 5000,
workers = 4,
static_prefix = NULL
)
Argument | Description |
---|---|
file_store |
The root of the backing file store for experiment and run data. |
default_artifact_root |
Local or S3 URI to store artifacts in, for newly created experiments. |
host |
The network address to listen on (default: 127.0.0.1). |
port |
The port to listen on (default: 5000). |
workers |
Number of gunicorn worker processes to handle requests (default: 4). |
static_prefix |
A prefix which will be prepended to the path of all static paths. |
Set Experiment
Sets an experiment as the active experiment. Either the name or ID of the experiment can be provided. If the a name is provided but the experiment does not exist, this function creates an experiment with provided name. Returns the ID of the active experiment.
mlflow_set_experiment(
experiment_name = NULL,
experiment_id = NULL,
artifact_location = NULL
)
Argument | Description |
---|---|
experiment_name |
Name of experiment to be activated. |
experiment_id |
ID of experiment to be activated. |
artifact_location |
Location where all artifacts for this experiment are stored. If not provided, the remote server will select an appropriate default. |
Set Experiment Tag
Sets a tag on an experiment with the specified ID. Tags are experiment metadata that can be updated.
mlflow_set_experiment_tag(key, value, experiment_id = NULL, client = NULL)
Argument | Description |
---|---|
key |
Name of the tag. All storage backends are guaranteed to support key values up to 250 bytes in size. This field is required. |
value |
String value of the tag being logged. All storage backends are guaranteed to support key values up to 5000 bytes in size. This field is required. |
experiment_id |
ID of the experiment. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Set Tag
Sets a tag on a run. Tags are run metadata that can be updated during a run and after a run completes.
mlflow_set_tag(key, value, run_id = NULL, client = NULL)
Argument | Description |
---|---|
key |
Name of the tag. Maximum size is 255 bytes. This field is required. |
value |
String value of the tag being logged. Maximum size is 500 bytes. This field is required. |
run_id |
Run ID. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Set Remote Tracking URI
Specifies the URI to the remote MLflow server that will be used to track experiments.
mlflow_set_tracking_uri(uri)
Argument | Description |
---|---|
uri |
The URI to the remote MLflow server. |
Source a Script with MLflow Params
This function should not be used interactively. It is designed to be called via Rscript
from the terminal or through the MLflow CLI.
mlflow_source(uri)
Argument | Description |
---|---|
uri |
Path to an R script, can be a quoted or unquoted string. |
Start Run
Starts a new run. If client
is not provided, this function infers contextual information such as source name and version, and also registers the created run as the active run. If client
is provided, no inference is done, and additional arguments such as start_time
can be provided.
mlflow_start_run(
run_id = NULL,
experiment_id = NULL,
start_time = NULL,
tags = NULL,
client = NULL,
nested = FALSE
)
Argument | Description |
---|---|
run_id |
If specified, get the run with the specified UUID and log metrics and params under that run. The run’s end time is unset and its status is set to running, but the run’s other attributes remain unchanged. |
experiment_id |
Used only when run_id is unspecified. ID of the experiment under which to create the current run. If unspecified, the run is created under a new experiment with a randomly generated name. |
start_time |
Unix timestamp of when the run started in milliseconds. Only used when client is specified. |
tags |
Additional metadata for run in key-value pairs. Only used when client is specified. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
nested |
Controls whether the run to be started is nested in a parent run. TRUE creates a nest run. |
with(mlflow_start_run(), {
mlflow_log_metric("test", 10)
})
Transition ModelVersion Stage
Transition a model version to a different stage.
mlflow_transition_model_version_stage(
name,
version,
stage,
archive_existing_versions = FALSE,
client = NULL
)
Argument | Description |
---|---|
name |
Name of the registered model. |
version |
Model version number. |
stage |
Transition model_version to this tage. |
archive_existing_versions |
(Optional) |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Run MLflow User Interface
Launches the MLflow user interface.
mlflow_ui(client, ...)
Argument | Description |
---|---|
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
... |
Optional arguments passed to mlflow_server() when x is a path to a file store. |
library(mlflow)
install_mlflow()
# launch mlflow ui locally
mlflow_ui()
# launch mlflow ui for existing mlflow server
mlflow_set_tracking_uri("http://tracking-server:5000")
mlflow_ui()
Update model version
Updates a model version
mlflow_update_model_version(name, version, description, client = NULL)
Argument | Description |
---|---|
name |
Name of the registered model. |
version |
Model version number. |
description |
Description of this model version. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |
Update a registered model
Updates a model in the Model Registry.
mlflow_update_registered_model(name, description, client = NULL)
Argument | Description |
---|---|
name |
The name of the registered model. |
description |
The updated description for this registered model. |
client |
(Optional) An MLflow client object returned from mlflow_client . If specified, MLflow will use the tracking server associated with the passed-in client. If unspecified (the common case), MLflow will use the tracking server associated with the current tracking URI. |