RE: http_url_post speed concerns

["Darren McBride" <darren.mcbride@xxxxxxxxxxxxxxxxxx>]

Sender: "Darren McBride" <darren.mcbride@xxxxxxxxxxxxxxxxxx>

Scott,

Nope, 2-4Gb. Don't forget that PC's can use paging to move memory in and
out of the page file, and as a result are no longer stuck within the
limits of conventional memory. Obviously we never use that amount of
memory for strings, but the point is that the option to address that
amount of storage is there. In RPG we are always conscious of the limit
(64K for strings depending on the version, or 32767 array entries etc).
I don't know about C on the AS/400, but I'm sure with C on other
platforms the limit is dependant largely on how much you malloc before
using the pointer.

We have a design at the moment that requires sending and receiving a
large amount of XML data to a process on the PC. The PC has no problems
with receiving all of the information in a single string, but the AS/400
design must take the 64K limit into account. As a result, to ensure
there are no restrictions, I have had to use user spaces (and even then
there is a 16Mb limit).

Kind regards,
Darren



-----Original Message-----
From: owner-ftpapi@xxxxxxxxxxxxx [mailto:owner-ftpapi@xxxxxxxxxxxxx] On
Behalf Of Scott Klement
Sent: 16 June 2003 05:17
To: ftpapi@xxxxxxxxxxxxx
Subject: RE: http_url_post speed concerns


Sender: Scott Klement <sk@xxxxxxxxxxxxxxxx>


On Sun, 15 Jun 2003, Darren McBride wrote:
> completely useless - hopefully). My biggest problem with RPG in its 
> current implementation is string handling (64K max is a bit of a pain 
> when dealing with this stuff when you can have 2-4Gb strings on a PC)

2gb strings?!!  Most PCs have less than 1/2gb of RAM!  You'd have to do
a lot of work on your PC to make it capable of 2gb strings!  But, maybe
you meant 2mb??  (I hope so!)

> and using the IFS or user spaces for passing in larger strings to 
> these types of libraries is not within the remit of a lot of RPG 
> programmers that I've encountered.

I wrote an e-book on IFS, which now is online for free since Snap-eBooks
went out of business.  Maybe that'll help:

http://www.scottklement.com/rpg/ifs.html

User spaces are very simple, and capable of handing large strings (but
not
2gb!!) so, I don't see what's wrong with that...

> P.S. Scott, I would help out with this HTTP posting stuff, but my 
> skills so far haven't even come close. I will begin making use of the 
> library once I get an XML parser up and running, as I will mostly be 
> using this stuff for web services from RPG.

That's what it's for.   But, you don't have to be a wizard to help.  If
nothing else, once you've figured out how to make it work, you could
help other people who are doing the same things you are.
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