Re: Socket Speed Question - RPG vs PC

On Oct 4, 2020, at 12:46 PM, Brad Stone <bvstone@xxxxxxxxx> wrote:

In digging more into replies on StackOverflow I am seeing that the MTU size
may be what is limiting the amount of data on each read. In this case each
read is getting 1448 bytes. Interesting... you can Google "1448 bytes
socket" and see some say it's "normal" behavior.....



On Sun, Oct 4, 2020 at 12:15 PM Brad Stone <bvstone@xxxxxxxxx> wrote:

Very fast. :) It's all local.

I did just a test FTP download using the FTP client on the IBM i from a
speed test site. Rate was 4mbps. So even worse... yikes. FTP Upload was
the same speed.



On Sun, Oct 4, 2020 at 11:53 AM Jon Paris <jon.paris@xxxxxxxxxxxxxx>
wrote:

What speed do you get if you use (say) Filezilla to download the file
from the IBM i Brad?

On Oct 4, 2020, at 12:43 PM, Brad Stone <bvstone@xxxxxxxxx> wrote:

On Sun, Oct 4, 2020 at 11:25 AM John Yeung <gallium.arsenide@xxxxxxxxx>
wrote:

There are many things which I've found much faster on a PC than on an
IBM i. My intuition says this is almost all down to the respective
roles and design choices of the systems being compared. The
performance of the IBM i doesn't seem to be affected much as you add
users and workload. If I have too many things running on my
single-user PC, I start to notice.

I would agree here, except that I'm using a Power 8 (41A) with just

one

user in this case. Should have much more "horsepower" than my PC.
(should being the operative keyword here... haha).

Actually, my point is that the IBM i runs more-or-less the same
whether you have 1 user or (let's keep it real safe here) 10.

Compared to the PC, the IBM i at 1 user is dog slow. Then, at 10
users, the IBM i is running at basically the same speed as it did for
1 user, but the PC in all likelihood is struggling under the load.

The IBM i *does* have much more horsepower than your PC, but it
achieves it by generating prodigious torque limited to low revs, like
a freight train engine. The PC is more like a sports car.

Yep, I got that from your response. In fact, I almost replied with a
sports car vs tractor example.. :)

My concern is still that my line is 30mb down and I'm getting only about
8mb down using IBM i sockets. PC is pretty close to the 30mb.
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