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тАО10-23-2005 11:11 PM
тАО10-23-2005 11:11 PM
Re: FTP Slow From Alpha to External Sites
In it, the window size changes are shown.
Also post your sys$specific:[tcpip$etc]sysconfigtab.dat file.
Wim
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тАО10-24-2005 12:04 AM
тАО10-24-2005 12:04 AM
Re: FTP Slow From Alpha to External Sites
ALPHA_ROB$$ typ sys$specific:[tcpip$etc]sysconfigtab.dat
#
# TCP/IP Services for OpenVMS V5.1
# sysconfig parameter file
#
nfs:
tcp_threads=8
udp_threads=8
vfs:
vnode_age=120
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тАО10-24-2005 12:10 AM
тАО10-24-2005 12:10 AM
Re: FTP Slow From Alpha to External Sites
We had a similar problem, that we could drill down to two paths to a remote network (0.0.0.0) over different gateways (one the local NIC, the other the nearest router). We have the idea that starting the router would have introduces the second path but we never got proof. Deleting all routes and adding the right one solved the problem
(VMS 7.3-1, TCPIP 5.3, after clean install on new machine)
Willem
OpenVMS Developer & System Manager
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тАО10-24-2005 12:29 AM
тАО10-24-2005 12:29 AM
Re: FTP Slow From Alpha to External Sites
You have no special parameters set.
Before you do the slow ftp, open an extra session and start in it :
tcptrace/fu/pack=500/out=ip.txt xxx
where xxx is the ip address or name of the external site.
Then post ip.txt (with extention txt or I can't open it due to restrictions over here).
Wim
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тАО10-24-2005 03:54 AM
тАО10-24-2005 03:54 AM
Re: FTP Slow From Alpha to External Sites
Wim
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тАО10-24-2005 05:03 AM
тАО10-24-2005 05:03 AM
Re: FTP Slow From Alpha to External Sites
The slow speed is posible due to CPU, the disk interface, and the overall system bandwidth in the external machine.
What type of machine/OS/Disk drives availbe in the external site. These are all consititute the reason for slow transfer rate.
Archunan
Archie
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тАО10-24-2005 07:09 AM
тАО10-24-2005 07:09 AM
Re: FTP Slow From Alpha to External Sites
The system can not be in cause because ftp to an internal system has great performance.
So forget about cpu, working sets etc.
The remote system can not be blamed either because it is reacting fast when a PC is doing FTP.
IMO it must be something between the 2 nodes that is reacting differently (e.g. routers) and this only for a VMS node. So, the question is what is different in FTP-VMS compared with FTP-PC.
Robert : did you also check the tcp counters ?
Wim
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тАО10-24-2005 07:46 AM
тАО10-24-2005 07:46 AM
Re: FTP Slow From Alpha to External Sites
< The remote system can not be blamed
< either because it is reacting fast when a > PC is doing FTP.
Understand.. I am sorry.
Archunan
Archie
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тАО10-24-2005 12:35 PM
тАО10-24-2005 12:35 PM
Re: FTP Slow From Alpha to External Sites
Older versions of TCP/IP services for OpenVMS use window size of 4096 (UCX V4.2) while newer versions use window size of 61440 (TCP/IP V5.3, V5.4, etc.). FOr PC's, I think they might be using 128Kbytes window size.
Thanks and regards.
Michael
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тАО10-24-2005 08:41 PM
тАО10-24-2005 08:41 PM
Re: FTP Slow From Alpha to External Sites
Thanks for all your help BTW - I'll get the full trace done ASAP and pass back the results.
Rob.