Jobs

The replacement for pipeline / PipelineDefinition, a Job binds a Graph and the resources it needs to be executable.

Jobs are created by calling GraphDefinition.to_job() on a graph instance, or using the job decorator.

@dagster.job(name=None, description=None, resource_defs=None, config=None, tags=None, logger_defs=None, executor_def=None, hooks=None, op_retry_policy=None, version_strategy=None, partitions_def=None)[source]

Creates a job with the specified parameters from the decorated graph/op invocation function.

Using this decorator allows you to build an executable job by writing a function that invokes ops (or graphs).

Parameters
  • name (Optional[str]) – The name for the Job. Defaults to the name of the this graph.

  • resource_defs (Optional[Dict[str, ResourceDefinition]]) – Resources that are required by this graph for execution. If not defined, io_manager will default to filesystem.

  • config

    Describes how the job is parameterized at runtime.

    If no value is provided, then the schema for the job’s run config is a standard format based on its ops and resources.

    If a dictionary is provided, then it must conform to the standard config schema, and it will be used as the job’s run config for the job whenever the job is executed. The values provided will be viewable and editable in the Dagit playground, so be careful with secrets.

    If a ConfigMapping object is provided, then the schema for the job’s run config is determined by the config mapping, and the ConfigMapping, which should return configuration in the standard format to configure the job.

    If a PartitionedConfig object is provided, then it defines a discrete set of config values that can parameterize the pipeline, as well as a function for mapping those values to the base config. The values provided will be viewable and editable in the Dagit playground, so be careful with secrets.

  • tags (Optional[Dict[str, Any]]) – Arbitrary metadata for any execution of the Job. Values that are not strings will be json encoded and must meet the criteria that json.loads(json.dumps(value)) == value. These tag values may be overwritten by tag values provided at invocation time.

  • logger_defs (Optional[Dict[str, LoggerDefinition]]) – A dictionary of string logger identifiers to their implementations.

  • executor_def (Optional[ExecutorDefinition]) – How this Job will be executed. Defaults to multiprocess_executor .

  • op_retry_policy (Optional[RetryPolicy]) – The default retry policy for all ops in this job. Only used if retry policy is not defined on the op definition or op invocation.

  • version_strategy (Optional[VersionStrategy]) – Defines how each op (and optionally, resource) in the job can be versioned. If provided, memoizaton will be enabled for this job.

  • partitions_def (Optional[PartitionsDefinition]) – Defines a discrete set of partition keys that can parameterize the job. If this argument is supplied, the config argument can’t also be supplied.

class dagster.JobDefinition(mode_def, graph_def, name=None, description=None, preset_defs=None, tags=None, hook_defs=None, op_retry_policy=None, version_strategy=None, _op_selection_data=None)[source]
execute_in_process(run_config=None, instance=None, partition_key=None, raise_on_error=True, op_selection=None)[source]

Execute the Job in-process, gathering results in-memory.

The executor_def on the Job will be ignored, and replaced with the in-process executor. If using the default io_manager, it will switch from filesystem to in-memory.

Parameters
  • (Optional[Dict[str (run_config) – The configuration for the run

  • Any]] – The configuration for the run

  • instance (Optional[DagsterInstance]) – The instance to execute against, an ephemeral one will be used if none provided.

  • partition_key – (Optional[str]) The string partition key that specifies the run config to execute. Can only be used to select run config for jobs with partitioned config.

  • raise_on_error (Optional[bool]) – Whether or not to raise exceptions when they occur. Defaults to True.

  • op_selection (Optional[List[str]]) – A list of op selection queries (including single op names) to execute. For example: * ['some_op']: selects some_op itself. * ['*some_op']: select some_op and all its ancestors (upstream dependencies). * ['*some_op+++']: select some_op, all its ancestors, and its descendants (downstream dependencies) within 3 levels down. * ['*some_op', 'other_op_a', 'other_op_b+']: select some_op and all its ancestors, other_op_a itself, and other_op_b and its direct child ops.

Returns

ExecuteInProcessResult

with_hooks(hook_defs)[source]

Apply a set of hooks to all op instances within the job.