• Subject: Re: Objectconnect speed
  • From: "Alexei Pytel" <pytel@xxxxxxxxxx>
  • Date: Thu, 4 Jan 2001 09:59:30 -0600
  • Importance: Normal


While it's true thatObjectConnect will save object(s) into save file etc,
it does not use SNADS. I have seen this misconception before in this list.
ObjectConnect uses APPC to connect to remote system.
As an APPC application it is subject to all SNA/APPN/APPC tuning parameters
- frame size, pacing, RU size, LLC window size etc.
It's true that by default it is assumed to be background low-priority task,
but you can tune it to be as aggressive as you want.

It is certainly doable to do the same thing via FTP - save objects to save
file, transfer save file, restore objects.
By the way, since the amount of work to do is the same, I doubt it will
work faster. Of course, if you are able to tune communication configuration
- default TCP/IP parameters allow better performance
But if you have direct APPC connection between two systems I do not see a
reason to duplicate a programming effort to do something which is already
available.

Best regards
    Alexei Pytel



KirkG@PacInfoSys.com@midrange.com on 01/03/2001 09:13:40 PM

Please respond to MIDRANGE-L@midrange.com

Sent by:  owner-midrange-l@midrange.com


To:   MIDRANGE-L@midrange.com
cc:
Subject:  Re: Objectconnect speed



OBJECTConnect uses SNADS and SNADS is de-tunned if you will so to be a
background task for things like mail, spoolfiles and not high speed
transfers. OBJECTConnect is convenient in that it creates the savf, saves
the object(s), transfers them to system #2 and reverses the process all
with 1 cmd.

If you are good at writing batch FTP code and using rmtcmd you could write
you own simple program to do the same and use FTP as the transport.

Overall make sure that under CFGTCP that the "Maximum transmission unit"
under interfaces is set to   *LIND and
the "Maximum transmission unit" under routes is *IFC and the lind  SSAP
Frame Sizes are 1496.



---------------------------------
Kirk Goins
IBM Certified AS/400 Technical Solutions
DataMirror High Availability Certified
Pacific Information Systems - An IBM Premier Business Partner
503-674-2985             kirkg@pacinfosys.com
"WE KNOW TECHNOLOGY"
---------------------------------





Larry Bolhuis <lbolhuis@arbsol.com>
Sent by: owner-midrange-l@midrange.com
01/03/01 04:30 PM
Please respond to MIDRANGE-L


        To:     Midrange Systems Mailing List <MIDRANGE-L@midrange.com>
        cc:
        Subject:        Objectconnect speed


Has anyone experience with ObjectConnect and what kind of speed you can
get with the thing? Recently I timed the movement of a single 5GB
physical file and got barely 5Mb/sec speed. The sending machine is an
S20 4-way at V4R2, the receiving machine an 820 2-Way. Neither was doing
anything at the time (CPU <5% on both). The connection is pure SNA over
Ethernet. The Ethernet cards are both 100M and each reports a 100M full
duplex connection. Both are connected to the same Ethernet Switch which
reports virtually no traffic utilization.  Even wrksysact shows the send
and recieve tasks using virtually no CPU and no I/O. I'm going to try
again with performance tools running but.....

This is pretty sad performance with this kind of horsepower. Any ideas
or similair experiences? Tweaks to the LIND or CTLD maybe?

 - Larry

--
Larry Bolhuis
Arbor Solutions, Inc.
(616) 451-2500
(616) 451-2571 -fax
lbolhuis@arbsol.com
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