On 7/11/22 1:32 PM, Karl S Huf wrote:
I would refer anyone genuinely interested in sibling pend to
download and review Dr. H. Pat Artis's "Sibling Pend: Like a Wheel
Within a Wheel" 1996 CMG paper (available to download at Dr. Pat's
site http://www.perfassoc.com ). While the technology underpinning
storage has changed a lot the concept of sibling pend really hasn't.
I suspect this paper isn't new, though, for many on this list.
Thank you for the pointer to the paper as it's new to me. The concept
is not new, but the paper will be an interesting read.
Sibling PEND: Like a Wheel within a Wheel
Dr. H. Pat Artis - Published in 1996
Published in the Proceedings of CMG '96 Abstract: After more than 2
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
based subsystems. 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.
http://www.perfassoc.com/register.php/pdf/papers/sibling_pend_paper_96.pdf
--
Grant. . . .
unix || die
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