Multiple readers in a sequential file stage.

Ravindar · Post by **Ravindar** » Wed Apr 14, 2004 7:28 am

I want to know how multiple readers are working in a sequential file stage and for what purpose this option is given.

ray.wurlod · Post by **ray.wurlod** » Wed Apr 14, 2004 4:12 pm

The obvious purpose is for parallelism. The sequential file stage has a "lookahead" capability. This, combined with foreknowledge of the file's size, means that it is possible to establish the equivalent of database cursors into a text file, so as to process all of its data more swiftly.