Re: Are We Back to the "Wars" Now ?

Subject	Re: Are We Back to the "Wars" Now ?
Newsgroups	comp.os.linux.misc
References	(11 earlier) <vhth7o$1s5d5$4@dont-email.me> <heednZLHO-zE69_6nZ2dnZfqn_idnZ2d@earthlink.com> <vhvd06$2900d$1@dont-email.me> <vhvht1$28nn4$1@dont-email.me> <wwvldx8qw98.fsf@LkoBDZeT.terraraq.uk>
From	"186282@ud0s4.net" <186283@ud0s4.net>
Organization	wokiesux
Date	2024-12-25 03:23 -0500
Message-ID	<MTWdnX9Hd4WSXPb6nZ2dnZfqnPednZ2d@earthlink.com> (permalink)

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On 11/24/24 2:14 PM, Richard Kettlewell wrote:
> Lew Pitcher <lew.pitcher@digitalfreehold.ca> writes:
>> On Sun, 24 Nov 2024 14:25:10 +0000, Rich wrote:
>>> 186282@ud0s4.net <186283@ud0s4.net> wrote:
>>>> On 11/23/24 4:25 PM, Lawrence D'Oliveiro wrote:
>>>>> That’s irrelevant.  Pipes originated on the earliest Unix machine,
>>>>> which was a PDP-11 with only a 64kiB address space.  They work great
>>>>> for pumping around gigabytes of data, but you don’t need
>>>>> gigabyte-sized memory buffers to do that.
>>>>
>>>>    It all has to be SOMEWHERE ... if not in RAM then
>>>>    on a mass storage device.
>>>
>>> Nope, at least not with pipes.
>>
>> Hold on a sec.... pipes are /buffered/ in RAM, so there's at least
>> a small bit of ram set aside for each open pipe.
> 
> The word ‘all’ isn’t just decoration.  The claim was ‘it all has to be
> somewhere’, and Rich’s point (as I understand it) is that it does not
> all have to be somewhere.
> 
> For example,
> 
>    head -c $((1024*1024*1024)) /dev/urandom | sha256sum
> 
> puts a gigabyte of data through a pipe, but at no point does anything
> allocate anywhere close to a gigabyte of storage of any kind.


   There's truth here ... the gigabyte gets kinda 'spread out'.

   But what if it was ten GB, or 100 ?

   So, if you wanna count on sending vast quantities of
   data in pipes, go ahead - it'll almost always work.

   Until vids go 16k or something ...

   As said LONG back ... each developer has to make
   decisions based on their app and the 'likely'
   systems/usage. There isn't really a 'wrong' or
   'right' way here - just 'alternatives'. I like
   terse pipes, you may not care.

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Re: Are We Back to the "Wars" Now ? "186282@ud0s4.net" <186283@ud0s4.net> - 2024-12-25 03:23 -0500
  Re: Are We Back to the "Wars" Now ? Richard Kettlewell <invalid@invalid.invalid> - 2024-12-27 08:44 +0000
  Re: Are We Back to the "Wars" Now ? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-12-28 07:08 +0000

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