🚀 go-pugleaf

cc971@cleveland.Freenet.Edu (Stephen  C. Fitch) writes:


>Hi,

>I am interested in gathering together peoples experience on
>the subject of file transfer. We have a 2200/433 + DCP 40s.
>This hardware runs DDN1100, CMS1100 7r2, along with the
>rest of CD5. What I would like to do is improve the efficiency
>of our FTP (TCP/IP) file transfers and therefore reduce the
>time to transfer our multi-megabyte files. The file transfers
>take place each night, down to UNIX hosts.

>Has anyone spent time optimizing CMS1100, TCP/IP, LAN Platform,
>and DDN1100 for large file transfers. I would be interested in
>and configuration definitions that have proven to be useful.
>My own line of attack at the moment is to adjust the 2200 to
>DCP channel frame size, from its current setting of 2400 bytes.

>You comments will be appreciated, if you want me to be more
>specific on certain points don't hesitate to ask.

>Steve Fitch

We have not attempted specific optimization. We are much happier when we do a
"get" from a remote machine than a "transfer" from our 2200/422. What we have
seen is that one ftp from the 2200 to the Sun can cause our DCP40 to hit
100% cpu utilization. Also an XT class PC can run ftp fast enough to cause
cpu utilization to go to 60%. While the proper approach is probably to
increase the block sizes in TELCON, I doubt that a DCP40 will give you 
much more than you are getting. By the way, what is your transfer rate?