gartley@ALDNCF.ALCOA.COM (J O GARTLEY) (12/08/89)
About a mouth ago I was transferring data from my MAC II (using NCSA Telnet V2.3) to a VAX VMS system running VMS 4.7 and The Wollongong Group software WIN/TCP V3.2 My Mac II is connected to the Ethernet via a Kinetics Etherport II card. The Vax is an 11/785 with a DEUNA card. The Transfer speed was about 150Kb/sec......Then IT happened... The Vax was upgraded to VMS 5.1 and the TWG software was upgraded to 5.0 Now my transfer speed is 25Kb/sec (6 times sssssllloooowwweeeerrrr) I have another setup that uses a Kinetics Fast/Path-4 as a router between the Appletalk and the Ethernet and the rate went from about 40-50Kb/sec to 9kb/sec....... Has anyone else seen this problem....or know of a solution.... Thanks, John Gartley gartley@aldncf.alcoa.com
hulsebos@ehvie0.tq.ine.philips.nl (rob hulsebos) (12/12/89)
In article <8912071317.aa12002@louie.udel.edu> gartley@ALDNCF.ALCOA.COM (J O GARTLEY) writes: >About a mouth ago I was transferring data from my MAC II (using NCSA >Telnet V2.3) to a VAX VMS system running VMS 4.7 and The Wollongong >Group software WIN/TCP V3.2 > >The Vax was upgraded to VMS 5.1 and the TWG software was upgraded to 5.0 > >Now my transfer speed is 25Kb/sec (6 times sssssllloooowwweeeerrrr) I do not know if it has anything to do with it, but one of my collegues found a problem in the C-library on VMS. Although I do not know exactly what happened, it looked like the stupid library did a flush of all its disk-buffers whenever a single byte was written to a file. Of course this is disastrous from a performance-point-of-view. It took him only a few months to figure out while all our compiles suddenly took so long... because of the 'upgrade' to VMS 5 :-( ------------------------------------------------------------------------------- Rob Hulsebos == hulsebos@tq.ine.philips.nl Tel +31-40-785723, Fax +31-40-786114 Philips I&E - Where the future is being made today!