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FTP Transfer from Windows to VMS

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3 replies

by clinton.valverde

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We maintain a T-1 network between two sites primarily for the purpose of transferring image files as well as software revisions between the sites. The system has three different computer types at each end of the network. They include Windows 2000, UNIX and VMS operating systems. Typically we are attempting to send 6,000 to 10,000 files with size ranging from 2k to 200k . All together, we to transfer from 20 to 40 gigabytes worth of total data. Presently the data transfer rate is deemed too slow. It is taking 3 hours to transfer 4 gig of data. A crossover between the two systems showed no change in data exchange. A test between two windows boxes shows the same data exchange done in 20 minutes. Suspect the VMS machine or the
VMS to Windows interface. Any sugestions?

3 replies

by tony hopkinson

If it's using FTP , there isn't one.
I've done a lot of VMS file transferring in the past FTP and socket to socket, never noticed any particular performance hit.

How is the TCP/IP stack implemented on the VMS box.

You might also want to look at how the traffic is being routed. Another one I've seen is what logon is being used, may be there is a big login script attached to the user.

Not using Pathworks are you? that's bad bloat for a task like this.

by msicking

First of all, 4 GBytes in 3 hours is about a 3MBPS transfer rate or two full T-1's. (3000000000 x 8 bits/byte)/(3*60*60) And your Windows boxes do it at a speed of almost 27 Mbps. How many T1's do you have? 18?? If so, you would save a lot of money investing in something like Riverbed's Steelhead appliances. Especially for the software revisions

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