Built to boost sequencial I/O’s of your batch jobs. The I/O Booster product intercepts each Open issued by z/OS through the applications and modifies the buffers, increasing it according to parameters previously established in the product. As the main part of the process, the I/O Booster has a dynamic interface in z/OS Open routines which is invoked every time an OPEN is issued for NON VSAM files. Once the I/O Booster is active and the rules table is loaded into memory, the I/O Booster updates buffers parameter for each file that matches with I/O Booster rules applying the most suitable value for buffers. Through an user-friendly ISPF interface are parameterized which jobs / steps / procsteps / programs / ddnames / dsnames and userids should or should not have their datasets buffered with the suitable buffer limits.