clusterIdentifier
A unique identifier for the cluster. You use this identifier to refer to the cluster for any subsequent cluster operations such as deleting or modifying. The identifier also appears in the Amazon Redshift console.
Constraints:
Must contain from 1 to 63 alphanumeric characters or hyphens.
Alphabetic characters must be lowercase.
First character must be a letter.
Cannot end with a hyphen or contain two consecutive hyphens.
Must be unique for all clusters within an Amazon Web Services account.
Example: myexamplecluster