[Info-vax] TCPIP performance for VMS

[JF Mezei]

Jim wrote:

> that you ask - but I will offer this - the TCP send indow size can
> impact the speed of FTP transfers. Your MAC is faster than the VMS
> system when sending a file - does it use the same send window size as
> the VMS system? If not, try setting your VMS system to match it and
> see if you get similar performance.

That is the big irony: the VMS send and receive  window size are larger
than on my Mac !

Btw, you need to manually set those in:

SYS$STARTUP:TCPIP$SYSTARTUP.COM

example:
$! Standard parameters for any node
$  SYSCONFIG = "$SYS$SYSTEM:TCPIP$SYSCONFIG.EXE"
$  IFCONFIG = "$SYS$SYSTEM:TCPIP$IFCONFIG.EXE"
$!
$SYSCONFIG -r inet tcp_recvspace=255552
$SYSCONFIG -r inet tcp_sendspace=255552
$SYSCONFIG -r inet udp_recvspace=65536
$SYSCONFIG -r inet udp_sendspace=65536
$SYSCONFIG -r inet ipgateway=1
$SYSCONFIG -r inet ipforwarding=1
$!


$sysconfig -q  inet  will give you all the parameters you can change.

$sysconfig -s 	lists the valid sysbsystems (such as inet)


The TCPIP Guide to tuning mentioned a few other parameters I need to
look into (allocation of buffers etc).

There is more documentation about those parametres in the Tru64
documentation.