[e2e] Open the floodgate - back to 1st principles
cannara at attglobal.net
Sun Apr 25 21:56:42 PDT 2004
David, I'm afraid your point escapes me.
"David P. Reed" wrote:
> At 03:40 PM 4/25/2004, Cannara wrote:
> >But, in commercial nets, which now
> >must use TCP/IP because that's what comes on all the boxes, and allows
> >Internet/corporate-web access for browsing, there are generally few parallel
> >sessions running.
> IBM made this argument against general purpose file systems. They said
> that all "real" business applications were record-oriented databases, so
> they should be implemented directly on disk drives, using application
> specific record-sizes and blocking factors, and tuning the disk hardware
> level format directly to the structure of the application. Thus ISAM was
> There are still some applications where file systems and relational
> databases introduce overheads of a factor of 2-5 over what is possible on
> the raw hardware. And there are still some programmers who yearn for a
> day when operating systems let you write hardware channel programs that get
> executed in the disk controller.
> Others have realized that the benefit of abstraction means not having to
> recode their applications every 2 years - which is worth even a substantial
> You are free in your specialized corporate applications to use whatever
> protocols you like - typically you can still write code in device drivers
> that gets down to the raw hardware. I commend that strategy to you.
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