The new Stream Manager update has stats collection which can be viewed after a stream ends. This expands on earlier versions of Stream Manager that supported simple live statistics about a stream via currentSubscribers.

This Short-Term Stream Usage Statistics API has more detailed information about a stream session, such as approximate disconnects, total subscribers, stream duration.

• Read All Usage Stats
• Read Stream Usage Stats
• Delete Stream Usage Stats
• Delete Specific Stream Usage Stats
• Delete All Usage Stats

Notes on Usage Stats

• The stream usage stats provide useful information about stream usage over an autoscaling setup. The usage stats attempts to mirror a small part of stream statistics provided by standalone Red5 Pro instances using the Red5 pro server api. Since the actual connect/disconnect, subscribe/unsubscribe logging depends on the autoscale plugin reportingSpeed, there can be a slight margin of error in evaluating the exact number of subscribers at a given time.
• Stream Manager attempts to collect and accumulate stream stats even from failed/terminating edges as well in case of an edge failure in between a streaming session. However nodes are force-removed from the system are not accounted for since they do not follow the node life-cycle.
• Currently this feature is only available for use with “simple” clusters (containing origin and edge nodes only).

Read All Usage Stats

Description

Reads all stream usage records from the data store.

REQUEST

• URI : http://{host}:{port}/streammanager/api/4.0/admin/event/usage?accessToken=<accessToken>
• Method: GET
• Data: NA

RESPONSE

• Failure: HTTP CODE 400 or 404
• Data:

    {
      "errorMessage": "<error-message-string>",
      "timestamp": <error-timestamp>
    }

• Success: HTTP CODE 200
• Data:

     [
      {
          "name": "<stream-name>",
          "scope": "<stream-scope>",
          "startTime": <publish-start-time>,
          "endTime": <publish-stop-time>,
          "duration": <session-duration>,
          "aciveSubscribers": <last-known-active-subscribers>,
          "maxSubscribers": <last-known-peak-subscribers>,
          "lostSubscribers": <last-known-disconnected-subscribers>,
          "totalSubscribers": <last-known-total-subscribers>,
          "updated": <last-update-timestamp>
      }
    ]

Example

REQUEST

• URI: http://{host}:{port}/streammanager/api/4.0/admin/event/usage?accessToken=xyz123
• Method: GET
• Data : NA

RESPONSE

• Success: HTTP CODE 200
• Data:

    [
        {
        "name": "stream1",
        "scope": "live",
        "startTime": 1525079735737,
        "endTime": 1525079744557,
        "duration": 8820,
        "aciveSubscribers": 2,
        "maxSubscribers": 0,
        "lostSubscribers": 2
        "totalSubscribers": 4,
        "updated": 1525079744558
        }
    ]

Read Stream Usage Stats

Description

Reads stream usage records for a given stream name and a scope from the data store.

REQUEST

• URI : http://{host}:{port}/streammanager/api/4.0/admin/event/usage/{scopeName}/{streamName}?accessToken=<accessToken>
• Method: GET
• Data: NA

RESPONSE

• Failure: HTTP CODE 400 or 404
• Data:

    {
      "errorMessage": "<error-message-string>",
      "timestamp": <error-timestamp>
    }

• Success: HTTP CODE 200
• Data:

     [
      {
        "name": "<stream-name>",
        "scope": "<stream-scope>",
        "startTime": <publish-start-time>,
        "endTime": <publish-stop-time>,
        "duration": <session-duration>,
        "aciveSubscribers": <last-known-active-subscribers>,
        "maxSubscribers": <last-known-peak-subscribers>,
        "lostSubscribers": <last-known-disconnected-subscribers>,
        "totalSubscribers": <last-known-total-subscribers>,
        "updated": <last-update-timestamp>
      }
    ]

Example

REQUEST

• URI: http://{host}:{port}/streammanager/api/4.0/admin/event/usage?accessToken=xyz123
• Method: GET
• Data : NA

RESPONSE

• Success: HTTP CODE 200
• Data:

    [
        {
        "name": "stream1",
        "scope": "live",
        "startTime": 1525079735737,
        "endTime": 1525079744557,
        "duration": 8820,
        "aciveSubscribers": 2,
        "maxSubscribers": 0,
        "lostSubscribers": 2
        "totalSubscribers": 4,
        "updated": 1525079744558
        }
    ]

Delete Stream Usage Stats

Description

Deletes stream usage records for a given stream name and a scope from the data store

REQUEST

• URI: http://{host}:{port}/streammanager/api/4.0/admin/event/usage/{scopeName}/{streamName}?accessToken=<accessToken>
• Method: DELETE
• Data: NA

RESPONSE

• Failure: HTTP CODE 400 or 404
• Data:

    {
      "errorMessage": "<error-message-string>",
      "timestamp": <error-timestamp>
    }

• Success: HTTP CODE 200
• Data: NA

Example

REQUEST

• URI: http://{host}:{port}/streammanager/api/4.0/admin/event/usage/live/stream1?accessToken=xyz123?accessToken=xyz123
• Method: DELETE
• Data: NA

RESPONSE

• Success: HTTP CODE 200
• Data: NA

Delete Specific Stream Usage Stats

Description

Deletes a specific stream usage record for a identified by the stream name, the scope and the stream publish start time (as UTC milliseconds) from the data store

REQUEST

• URI: http://{host}:{port}/streammanager/api/4.0/admin/event/usage/{scopeName}/{streamName}?accessToken=<accessToken>&startTime=<publish-start-time>
• Method: DELETE
• Data: NA

RESPONSE

• Failure: HTTP CODE 400 or 404
• Data:

    {
      "errorMessage": "<error-message-string>",
      "timestamp": <error-timestamp>
    }

• Success: HTTP CODE 200
• Data:

      {
        "name": "<stream-name>",
        "scope": "<stream-scope>",
        "startTime": <publish-start-time>,
        "endTime": <publish-stop-time>,
        "duration": <session-duration>,
        "aciveSubscribers": <last-known-active-subscribers>,
        "maxSubscribers": <last-known-peak-subscribers>,
        "lostSubscribers": <last-known-disconnected-subscribers>,
        "totalSubscribers": <last-known-total-subscribers>,
        "updated": <last-update-timestamp>
      }

Example

REQUEST

• URI: http://{host}:{port}/streammanager/api/4.0/admin/event/usage/live/stream1?accessToken=xyz123&startTime=1525065208331
• Method: DELETE
• Data: NA

RESPONSE

• Success: HTTP CODE 200
• Data:

    {
        "name": "stream1",
        "scope": "live",
        "startTime": 1525079735737,
        "endTime": 1525079744557,
        "duration": 8820,
        "aciveSubscribers": 2,
        "maxSubscribers": 0,
        "lostSubscribers": 2
        "totalSubscribers": 4,
        "updated": 1525079744558
    }

Delete All Usage Stats

Description

Deletes stream usage records for a given stream name and a scope from the data store

REQUEST

• URI: http://{host}:{port}/streammanager/api/4.0/admin/event/usage?accessToken=<accessToken>
• Method: DELETE
• Data: NA

RESPONSE

• Failure: HTTP CODE 400 or 404
• Data:

    {
      "errorMessage": "<error-message-string>",
      "timestamp": <error-timestamp>
    }

• Success: HTTP CODE 200
• Data: NA

Example

REQUEST

• URI: http://{host}:{port}/streammanager/api/4.0/admin/event/usage?accessToken=xyz123
• Method: DELETE
• Data : NA

RESPONSE

• Success: HTTP CODE 200
• Data: NA

Parameters such as startTime, endTime and updated are represented in terms of UTC milliseconds, making it easy to be converted and read in any timezone.

Short term stats are automatically cleared up periodically by the Stream Manager’s internal cron. The max time period (in days) can be configured in the Stream Manager configuration file {RED5_HOME}/webapps/streammanager/WEB-INF/red5-web.properties in the DATA STORE MANAGEMENT CONFIGURATION SECTION as shown below:

## DATA STORE MANAGEMENT CONFIGURATION SECTION
store.usageStatsDiscardThresholdDays=7

You can also manually delete records using the Delete Stream Usage Stats and Delete Specific Stream Usage Stats API calls.