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File Systems

Scenario

Result files are created when tasks are running. Flink enables you to configure parameters for file creation.

Configuration Description

Configuration items include overwriting policy and directory creation.

Table 1 Parameter description

Parameter

Description

Default Value

Mandatory

fs.overwrite-files

Whether to overwrite the existing file by default when the file is written.

false

No

fs.output.always-create-directory

When the degree of parallelism (DOP) of file writing programs is greater than 1, a directory is created under the output file path and different result files (one for each parallel writing program) are stored in the directory.

  • If this parameter is set to true, a directory is created for the writing program whose DOP is 1 and a result file is stored in the directory.
  • If this parameter is set to false, the file of the writing program whose DOP is 1 is created directly in the output path and no directory is created.

false

No