You can specify the rollover size or rollover time in the

Execution Environment

area of the Developer tool. The steps to configure the rollover size and rollover time are similar to the configurations when you run a map. The rollover size is the target file size, in gigabytes(GB), at which to trigger rollover. A value of zero (0) means that the target file does not roll over based on size. Default is 100 bytes. The rollover time is the length of time, in hours, for a target file to roll over. After the time period has elapsed, the target file rolls over. A value of zero (0) means that the target file does not roll over based on time. Default is 1 hour.

You can specify the maximum runtime interval property when you perform data preview on a streaming job in the

Execution Environment

area of the Developer tool. Maximum runtime interval is the maximum time to run the mapping before it stops. Default is 2.5 minutes. If you set values for this property and the

Maximum Rows Read

property, the mapping stops running when one of the criteria is met.

You cannot preview data on an Aggregator transformation.

You cannot connect to the downstream transformation when you map the timestamp port in the Windows transformation to the Aggregator transformation.

When you preview a streaming source that contains a timestamp column, the timestamp column appears blank. However, the data appears in the timestamp column when you export the data.

You cannot preview data for a Normalizer transformation or a Router transformation when the transformations are configured with multiple output groups.