Kevin,
    =20
    =20
    =20
         We have an RS/9000 model 990 which is channel (bus + tag) attached=
=20
     to our MVS system. I am not familiar with the MVS details (I'm=20
     primarily a UNIX hack) but our users claim "BEST" FTP transfer rates=20
     of 2.5 - 3 MBYTES/sec over the B&T interface. So your rates with ADSM=20
     over fiber seem very slow. This may be due to ADSM overhead and/or=20
     possibly overworked systems on either side. Try FTP'ing a large file,=20
     see what you get for throughput and go from there. If your FTP=20
     throughput is significantly better than ADSM blame ADSM. As another=20
     side note... my understanding is the TCP/IP implementation on a MVS=20
     system is much slower than UNIX (even Mainframe software vendors=20
     selling network backup products admit this). Expect MVS TCP/IP to=20
     max-out at 2 or 3 MBytes/sec regardless of your network topology. This=
=20
     issue, I have been told, has to do with the way TCP/IP runs as a task=20
     on MVS whereas UNIX has a kernel-level IP implementation.
    =20
    =20
     Tom Mcknerney


______________________________ Reply Separator ____________________________=
_____
Subject:      Transfer rate from RS/6000 to MVS
Author:  PC:Kevin.Brown AT BCBSKS DOT COM at INTERNET
Date:    6/7/96 3:16 PM


Recently we obtained an RS/6000 with an ESCON card. We are planning on usin=
g
 this card to backup the RS/6000 to our host using ADSM and TCP/IP. Does
anyone have experience with this kind of setup? We ran a preliminary FTP fr=
om=20
the host to the RS/6000 which transfered 17 MB in 34 seconds. This seems sl=
ow=20
to us. Should an ADSM backup be faster? Hardware and software are as follow=
:
    =20
 Host:   IBM 9672-R83 running MVS/ESA 4.3, DFSMS 1.2, TCP/IP 3.1, ADSM 2.1=20
 Client: RS/6000-J30 running AIX 4.1.4, ADSM 2.1
    =20
Any info would be appreciated.
    =20
********************************************************************
    =20
Kevin Brown StorAdmin
Blue Cross/Blue Shield of KS.
Kevin.Brown AT BCBSKS DOT COM
    =20