02-06-2010
Good post.
On these topics, I find the definition of the term is relative to where the person "sits".
For example, HPC to a web architect is very different than HPC to an ASIC designer and is also very different to a trading systems architect. That is why I said the use of the term is relative.
The same is true for other TLA, like SOA, for example. To a CIO, a "service" might be defined as a massive globa IT system. To the web architect, a "service" might be a payment gateway. To a programmer, a "service" might be a piece of code in an object oriented design library. To a chip designer, a "service" might be a graphics card on the motherboard bus.
"High Performance" is relative to the application, which is very different depending on where you "sit". This is also very true for the term "computing".
These terms are relative to the level of architectural and application abstraction and granularity.
This concept is hard for many people to grasp, especially those who work in a specific area and who define terms based on their own perspective; and often this is a major cause of problems in IT systems design because people tend to forget that the perspective of the user defines their worldview.
Another way of saying this is "All politics are local."
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LEARN ABOUT OPENSOLARIS
perspective
Perspective(3I) InterViews Reference Manual Perspective(3I)
NAME
Perspective - visible portion of an interactor
SYNOPSIS
#include <InterViews/perspective.h>
DESCRIPTION
A perspective object describes which part of an interactor's total display area is visible in the interactor's canvas. The main use of
perspectives is for scrolling, panning, and zooming interactors. The member variables (x0, y0) define the origin of the interactor's dis-
play area; width and height define the total height of the area. The member variables (curx, cury) define the lower-left corner of the
interactor's canvas relative to the total area; curwidth and curheight define how much of the total area is displayed in the canvas.
The member variables sx, sy, lx, and ly specify small and large increments in each dimension. These increments are used by a scroller to
implement line and page scrolling.
PUBLIC OPERATIONS
Perspective()
Define a new perspective with all member variables initialized to zero.
void Attach(Interactor*)
Add to the list of interactors that are interested in updates to the perspective. These interactors reflect the perspective visual-
ly; examples include scrollers and sliders.
void Detach(Interactor*)
Remove an interactor from the list of those interested in updates. This operation should be called from the interactor's destruc-
tor.
void Init(Coord x0, Coord y0, Coord width, Coord height)
Initialize the perspective display area.
void Update()
Notify all the interactors interested in the perspective that it has changed. The perspective's interactor should call Update after
modifying its perspective.
SEE ALSO
Adjuster(3I), Interactor(3I), Panner(3I), Scroller(3I)
InterViews 15 June 1987 Perspective(3I)