# UpdateMode

Specifies how to update the metadata of a bucket or object in Google Cloud Storage when you use the update action. You can set this parameter to one of the following values:

- `append` - the metadata you specify is appended to the existing metadata. If your update action includes a metadata field that already exists, its value is overwritten with the new value.
- `replace` - all existing metadata fields are removed before the metadata specified in the update action is added.

Type: | String
Default: | append
Required: | No
Configuration Section: | TaskName or FetchTasks
Example: | `UpdateMode=replace`
See Also: |

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