I found this on IBM.COM http://www-03.ibm.com/systems/z/hardware/connectivity/news.html
High Performance FICON for System z (zHPF) zHPF is a performance and RAS enhancement of the System z architecture and the FICON channel architecture implemented exclusively in System z10. By exploiting zHPF by the FICON channel under the z/OS operating system, the control unit will reduce the FICON channel overhead. This is achieved by protocol simplification and reducing the number of information units (IUs) processed, resulting in more efficient use of the fiber link. The FICON Express4 and FICON Express2 features support both the existing FICON architecture and the zHPF architecture. zHPF channel programs can be exploited by OLTP I/O workloads – such as DB2, VSAM, PDSE, and zFS – that transfer small (4K) blocks of fixed-sized data. The maximum number of I/Os is designed to be improved up to 100% for small data transfers that can exploit zHPF. Realistic production workloads with a mix of data transfer sizes can see up to 30% to 70% of FICON I/Os utilizing zHPF resulting in up to a 10% to 30% savings in channel utilization. Lizette > >This is recently announced feature of DS8000. >Any clue how does it work ? ---------------------------------------------------------------------- For IBM-MAIN subscribe / signoff / archive access instructions, send email to [EMAIL PROTECTED] with the message: GET IBM-MAIN INFO Search the archives at http://bama.ua.edu/archives/ibm-main.html
