IBM Streams 4.2

Visualizing stream data to troubleshoot Streams applications

In the Instance Graph view, you can view the data that flows through your application. You can select the tuple attributes that you want to view to isolate and troubleshoot problems in your application. You can validate that correct data is flowing into your operator.

Procedure

In the Instance Graph view, right-click a stream and click Show Data.
In the Data Visualization settings window, on the Attributes tab, you can select a subset of the attributes that you want to view.
On the Filter tab, you can select an attribute and and specify a regular expression to filter the attribute values to view only those tuples that match the filter value. This filter is applied after the tuple sample is taken.
On the Buffer tab, set the buffer size and throttle size. By default, the throttle size is set to collect 10 tuples every interval.
On the Table tab, specify the refresh interval for the Data Visualization table.

Results

A separate property window opens that shows tuples as they flow. Use this window to verify that correct data is flowing. You can view data for multiple operators or streams at a time. You can check the inbound tuples and outbound tuples of an operator.