IBM zEnterprise storage I/O advancements

Amann, Sven; Banzhaf, G.; Bender, C. A.; Bubb, T. E.; Casper, D. F.; Flanagan, J. Randall; Friedrich, R.; Higgs, Raymond; Kuch, G.; Schmitt, C.; Zee, M.

doi:10.1147/jrd.2011.2177919

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High-performance Ficon (Zhpf) Extended Distance1

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“…The heritage FICON protocol performs well at a distance because it is a full-duplex protocol and is able to pipeline data. The enhanced zHPF (high-performance FICON) protocol provides improved performance at lower channel utilization, as well as other advantages [4]; thus, it is desirable to enable it in disaster-recovery configurations. However, zHPF uses the half-duplex FCP as its underlying transport.…”

Section: High-performance Ficon (Zhpf) Extended Distancementioning

confidence: 99%