Understanding Security Permissions

Topics in a stream are protected from unauthorized access by the adminperm, copyperm, comsumeperm, produceperm, and topicperm security permissions. You set these security permissions by using access-control expressions when you create or edit a stream.

Determines which users can modify access-control expressions for a stream, set up replication of a stream, and modify other attributes of a stream.
Determines which users can run the mapr copystream and mapr diffstreams utilities on the stream.
Users with this permission can publish messages to topics in a stream, read messages in topics from a stream, and create or remove topics in a stream.
Determines which users can read messages in topics from a stream.
Determines which users can publish messages to topics in a stream.
Determines which users can create topics in a stream or remove them.

The following example shows the adminperm, consumeperm, produceperm, and topicperm permissions on a stream named traffic_sensors, which includes the topics traffic_sensors_sf and traffic_sensors_ny.

Figure: How permissions grant or deny access to a stream

For general information about access-control expressions, see ACE Syntax.