AEM 6.2 PDF generation Watched Folder Alternate and Clustering options



After migration from Adobe Central 5.x to AEM 6.2 , we noticed that PDF generation is done by using the Watched folder functionality. XML input files needs to be created and placed in the Watched folder and AEM pickups the input xmls from watched folder, creates the PDF and places the PDF in the output folder. Is there any other way by which PDF generation can be triggered in AEM 6.2 ?. Is there any way to do the clustering of the watched folder to enable scaling ?