Use a Static File source service to read data from a directory that contains a source file or files that do not change. When multiple files are processed in parallel, data from different files is interleaved.
When you configure the Static File source service properties, you can specify the file name or the Java regular expression pattern that applies to the convention used to name the source file. You can also configure the number of threads that are required to process the files and the waiting time. The waiting time is the amount of time to the Static File source service waits before reading data from the active file.