The only place I've ever seen the details of IND$FILE communication is
in a 1995 document that I'll assume IBM provided to the terminal
emulator companies at the time. It describes both the older
screen-style mode and the newer mode. I'm not sure where/when I got it.
2010 according to the file date on my PC.
Somebody put a copy here: https://x3270.bgp.nu/SS-HCS12-1372-00.pdf
Does the IND$FILE command itself have any help doc? I remember looking
and not finding anything. I ended up writing down the various command
line options I could see by browsing the load module.
https://www.mildredbrennan.com/mvs/ind$file_options.png
On 9/25/2024 2:12 PM, David Spiegel wrote:
Hi Charles,
Where is this design change documented?
Thanks and regards,
David
On 2024-09-25 16:56, Charles Mills wrote:
That was true once upon a time but has not been true since about 1995.
IND$FILE uses a 3270 sub-protocol called "structured fields" and can
transfer up to 32K of binary data in a block.
It's still single-task and half-duplex, and layered into TSO, all of
which makes it a lot slower than FTP, but it is NOT 3270 screen oriented.
Charles
On Wed, 25 Sep 2024 15:30:50 -0400, David Spiegel
<[email protected]> wrote:
Hi Gil,
If IND$FILE replaces FTP, it would be slow beyond belief.
The way that IND$FILE works is that it reads a screenfull (24*80=1920
Bytes) at a time and deals with the this buffer.
I cannot imagine the time it would take to Upload/Download a large TRS
Dataset.
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