[Info-vax] Slow FTP transfer Linux -> VMS

[Bob Gezelter]

On Aug 28, 3:02 am, Robin Schipper <"thespriteman <remove_this> wrote:
> Hi,
>
> when i try to put a big file (lets say 100 Mb) from a Linux system trugh
> FTP on a VMS system, the max speed is 1,5 MB/s
> when i try to put the same file from another VMS system (on the same
> network) to the VMS box the speed is about 10MB/s (it is a 100Mb network)
>
> does anyone know why the linux box doesn't speed up, and how to solve it?
>
> With Regards,
>
> Robin Schipper

Robin,

There are many reasons for why a large transfer between two systems
can be slow.

In the case described in the posting, I would also want to know what
the speed of equivalent transfers between the Linux system and other
systems. A LAN trace of the communications between the two systems can
also be educational.

There are many possible causes:

- mis-configured communications hardware (full/half duplex mismatches
produce impressive slowdowns when ACK packets get lost)
- traffic shaping devices in the data stream
- other network issues

- Bob Gezelter, http://www.rlgsc.com