Ceph » rgw

prevent topic names that would confuse things like ARN parsing and rados object namespacing

from https://docs.aws.amazon.com/sns/latest/api/API_CreateTopic.html#API_CreateTopic_RequestParameters

Name

    The name of the topic you want to create.

    Constraints: Topic names must be made up of only uppercase and lowercase ASCII letters, numbers, underscores, and hyphens, and must be between 1 and 256 characters long.

    For a FIFO (first-in-first-out) topic, the name must end with the .fifo suffix.

    Type: String

    Required: Yes