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Invisible wrote:
> So the concept of a filesystem storing named files already existed at
> this time?
Generally, yes. But you usually wound up pre-allocating files, and they were
contiguous on disk.
> Interesting. So the system actually "knows" where each field of a record
> is then?
Records were fixed size, so it was trivial to calculate.
>> I doubt that the internal processor speed is that much different than
>> current
>> PCs, but the i/o bandwidth is much higher in the mainframe.
>
> Really? I didn't think anybody had mainframes any more... just big
> server farms.
The people who want to do lots of I/O have machines where instead of GPUs
they have IOPs. A 800,000 line phone switch, for example, is pretty much
all IOP, with something like a 68000 running the actual switching part.
Of course, what one might call a "PC" nowadays has a terabyte of RAM and 96
quad-core processor chips, so the lines blur.
--
Darren New, San Diego CA, USA (PST)
Ada - the programming language trying to avoid
you literally shooting yourself in the foot.
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