A stream is a continually updating data object. It can have a number of sources, including a log file, a sensor, a network feed, a message bus, another database, and so on. A stream is like a , but one that continually updates. The number of records in a stream can be infinite, as with a log file that is continually read as new data is logged. A stream is a that is a relation but which does not store data like as a finite relation (such as a table in a database). Instead, a stream implements a "publish-subscribe" protocol. It can be written to by multiple writers and read from by multiple readers.
Streams must be present in s-Server before you can add them as a StreamLab source.
To add an s-Server stream a StreamLab source:
|1.||On the Sources page, drag a stream source from the left column into the center area.|
|2.||Click the new stream source. |
The Edit Stream Source page opens.
|3.||By default, StreamLab uses the for the new source. You can also select a schema from the pulldown menu on the left.|
|4.||Select a stream or streaming view from the pulldown menu on the right.|
|6.||Click the Go Up arrow to exit the source.|
|7.||To parse the newly added source, add a guide using the newly added Line source.|