:: DeveloperApi :: Metrics about reading input data.
:: DeveloperApi :: Metrics about writing output data.
:: DeveloperApi :: Metrics pertaining to shuffle data read in a given task.
:: DeveloperApi :: Metrics pertaining to shuffle data written in a given task.
:: DeveloperApi :: Metrics tracked during the execution of a task.
:: DeveloperApi :: Method by which input data was read.
:: DeveloperApi :: Method by which output data was written.
Executor components used with various cluster managers. See org.apache.spark.executor.Executor.