Sibling PEND: Like A Wheel Within A Wheel
نویسنده
چکیده
After more than two decades of refining performance measurement and tuning strategies for traditional DASD devices and the MVS I/O subsystem, performance analysts are now presented with the vagaries of measurement and tuning for RAID-5 basedsubsystems. While a variety of conceptual models might be proposed to explain the performance characteristics of these subsystems, this paper will focus on the author’s paradigm of a physical I/O subsystem within the logical MVS I/O subsystem and the sibling PEND which results from collisions within the physical disk subsystem.
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