Cindy,

We run ADSM V2 for AIX on an RS6000 J30, 16 Mb Token ring with Cisco
routers.
I don't know anything about the routers, so I'm not sure what is or
isn't comparable.
Also, our slowest clients are 486-based PC's, the majority are Pentiums,
so we have all the clients do compression before sending data.
And even with some very powerful NT nodes, in every case we have found
the backup time to be dependent on the speed of the CLIENT, we have
never seen any type of network bottleneck, and can't even stress the
J30.

SO, my point is, the Token right ISN"T the limiting factor.
There have been a lot of threads on this list about MVS TCP/IP - you
might want to review those.




        ----------
        From:   Cindy Cannam[SMTP:CCannam AT genam DOT com]
        Sent:   Friday, January 23, 1998 12:41 PM
        To:     ADSM-L AT vm.marist DOT edu
        Subject:        networking and adsm

        To all ADSMers:

        Just out of curiosity, how many of you folks are experiencing
dreadful (and
        I mean really horrible) network transfer rates for normal
incrementals from
        your ADSM client nodes to your ADSM server? I've contended all
along with
        the network people that a 1st backup of a new NT-based
client/node with
        approximately 8GB of data should not take DAYS, and should not
experience
        MULTIPLE time-outs --- if you crunch the numbers, the rate is
about 0.636
        GB/hour. I'm not a network guru, but even this is much, much
lower than I
        had expected when the router was 1st purchased.

        Environment:   ADSM server - MVS OS/390
                  TCP/IP
                  16 Mb Token ring (non-switched)
                  Cisco 7000 series router (7507) with one blade
dedicated to ADSM
        traffic only
        Clients:       Mostly NT, Lotus Notes on NT, UNIX/Sun, UNIX/AIX,
Novell
        (right now only the NT-based machines are          being backed
up with
        ADSM; the remaining machines are pending implementation --- I
don't think
        there's a           window BIG enough to handle the backups from
the other
        machines)

        I realize there are no network benchmarks available for ADSM
given the
        infinite number of network and environment configurations ADSM
may run
        under. But I'm most interested in hearing about folks who are
experiencing
        the same thing (and how you're correcting it, if possible), and
who out
        there is experiencing great transfer rates (like the guy who had
        24-25GB/hour via ATM) and would like to share with the ADSM
world your
        success story! I'm "building my case" for further investigation.

        Thanks much!

        C.L.Cannam
        Storage Management
        GENAM/St. Louis, MO/USA