• Subject: RE: DDM - Is TCPIP faster or better than SNA?
  • From: Chris Bipes <chris.bipes@xxxxxxxxxxxxxxx>
  • Date: Wed, 22 Nov 2000 08:35:38 -0800

I don't know about the over head associated with SNA vs. TCP/IP.  I suspect
that SNA has more bit per packet than TCP/IP but probably not enough to
worry about.  As for the sluggynest of DDM, each file I/O needs a turn
around to confirm the action happened.  That is what makes DDM so slow.  I
have used both over a LAN and not seen any performance difference in my
application which compare files on two different system to make sure they
are identical.  (Over 100,000 records and growing.)  Now our remote system,
connected via 56K leased line running SNA only and 128K Frame Relay running
TCP/IP only, well TCP/IP runs better than twice as fast, but the line is
twice as fast +. Also our regular traffic is running over the 56K line while
I was testing the difference and the 128K WAN is not really used.

Christopher K. Bipes    mailto:ChrisB@Cross-Check.com
Sr. Programmer/Analyst  mailto:Chris_Bipes@Yahoo.com
CrossCheck, Inc.        http://www.cross-check.com
6119 State Farm Drive   Phone: 707 586-0551 x 1102
Rohnert Park CA  94928  Fax: 707 586-1884

If consistency is the hobgoblin of little minds, only geniuses work here.
Karen Herbelin - Readers Digest 3/2000

-----Original Message-----
From: Stone, Brad V (TC) [mailto:bvstone@taylorcorp.com]
Sent: Wednesday, November 22, 2000 7:29 AM
To: 'MIDRANGE-L@midrange.com'
Subject: DDM - Is TCPIP faster or better than SNA?

Just wondering if anyone has any opinions or stats as to if TCPIP DDM files
are faster or better (ie. produce less network traffic) than SNA.

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