LFS size and hardware requirements

[J. Greenlees]

Alexander E. Patrakov wrote:
> J. Greenlees wrote:
>   
>> 8 hour build time? unless using the build scripts I don't think it's
>> possible without brand spanking new hardware with massive amounts of ram.
>>     
>
> ums.usu.ru (before it died in November, 2007 due to voltage spike): Pentium IV 
> 2.4 GHz (without hyperthreading), Intel S845WD1-E server board, 512 MB of RAM, 
> 120 GB IDE hard disk. Bought in May, 2003, not upgraded since then until the 
> complete replacement in November, 2007. Able to build LFS LiveCD (the full 
> version) in 12 hours. So we are not speaking about brand new hardware.
>
> And the "8 hours" figure has the following origin: it's the maximum amount that 
> we can realistically expect a typical desktop computer to stay on, so one 
> doesn't have to bother with exiting and reentering the build environment (that 
> is poorly documented in the book, probably because it is not supposed to be done).
>
>   
and this is done manually typing in, or copy and paste of the build
commands?
or is it scripted to remove the manual input [ slow point ] requirement?

>>> Hard disk space is a mandatory requirement.
>>> Disk requirement on IPCop is 2 GB free space before building.
>>> Indicative minimal memory could be somewhere between 128 MB.
>>> Recommended memory to build should more than 256 MB
>>> I have mesured IPCop 1.4 (is with gcc-3.3) building time on the same machine
>>> with 128 MB and 512 MB. 128 MB require 3 time more to build than with 512 MB
>>> memory.
>>>       
>
> We are talking about a bit different things. The paragrapk above is talking 
> about building gcc-3.3 based IPCop from itself - that's fine. But building 
> gcc-4.x with gcc-3.3 triggers a known bug in gcc-3.3 that leads to huge 
> consumption of memory (above 512 MB).
>
>   
>> and the learning opportunities for building on a more limited resource
>> system are greater, you run into problems from the limitations.
>>     
>
> Let me just throw your child into water and say "he learns swimming" (bad joke: 
> I can't swim). No, learning must be gradual, the reader must see a trouble-free 
> book first and _then_ experiment.
>   
That's how I learned to swim, just jumped right into the pool in the
back yard. :D
still can't float, not a good swimmer on top of the water, but almost a
fish under water :D