Re: [twsocket] FTP client stalling
I've discovered that if I drop the MTU on the Xp machine to 1352, then the file seems to be sent correctly without any stalling. Don't know why this should suddenly have become an issue, presumably a Windows update or something strange set upstream by the ISP ? regards David -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] FTP client stalling
> Incredibly after working correctly with my commercial FTP client > correctly, that too stalled on Fiday night, so I'm begining to suspect > it's not the component, but something on my PC/network/ISP not set > correctly. I know it's a bit off topic, but has anyone any idea what > I should look > for. From what I've read 8760 bytes is the max frame size that can be > sent before an acknowledgement is required (but I must admit I don't > quite understand how it all works). I reported a similar problem with the ICS FTP client a few weeks ago, although in my case files below about 12K were arriving at IIS/5 truncated. The problem seemed to get better when the Sonicwall firewall was replaced for a more powerful model, but has not gone away completely. Angus -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] FTP client stalling
I know it's a bit off topic, but has anyone any idea what I should look for. From what I've read 8760 bytes is the max frame size that can be sent before an acknowledgement is required (but I must admit I don't quite understand how it all works). The single ethernet packet can take 1460 bytes plus the header making a total of 1526 bytes (if my memory serves well). But Winsock/TCP uses a trick called "sliding windows" that sends multiple packets before waiting for an ACK. AFAIK, the window size can be arranged from registry. In high latency environments, bigger windows size means high throughput but also high kernel memory usage. Best Regards, SubZero -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] FTP client stalling
Incredibly after working correctly with my commercial FTP client correctly, that too stalled on Fiday night, so I'm begining to suspect it's not the component, but something on my PC/network/ISP not set correctly. I know it's a bit off topic, but has anyone any idea what I should look for. From what I've read 8760 bytes is the max frame size that can be sent before an acknowledgement is required (but I must admit I don't quite understand how it all works). regards David -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
Re: [twsocket] FTP client stalling
Have you tried with the FtpTst sample program delivered with ICS ? > FTPClient seems to be Version: 2.86 Quite old. Please try with latest ICS version downloaded from _my_ website. It works with D5. -- [EMAIL PROTECTED] http://www.overbyte.be - Original Message - From: "David Rose" <[EMAIL PROTECTED]> To: Sent: Friday, May 13, 2005 6:02 PM Subject: [twsocket] FTP client stalling > I have written a simple program to upload some files from my PC to our FTP > site. Basically once a new build of our software is complete, the program > kicks in to upload the files. > However about 75% of the time, the upload stalls after 8760 bytes. > > As far as I can see (from Google) this is a magic number with TCP/IP under > windows. > If I try and upload the same files to the same location using a commercial > FTP program, then it never seems to have a problem, so I'm assuming that > it either doesn't stall or internally copes with the stall without > reporting it to me. > > Any suggestions ? > These are the properties of the component and below is the simple code I'm > using to operate it. Delphi 5, FTPClient seems to be Version: 2.86 > > object FtpClient1: TFtpClient > Timeout = 60 > MultiThreaded = False > HostName = 'ftp.navigator.co.uk' > Port = 'ftp' > LocalAddr = '0.0.0.0' > UserName = <-removed from posting > PassWord = <-removed from posting > HostDirName = '/' > DisplayFileFlag = True > Binary = False > ShareMode = ftpShareCompat > Options = [ftpAcceptLF] > ConnectionType = ftpDirect > OnCommand = FtpClient1Command > OnProgress = FtpClient1Progress > OnSessionConnected = FtpClient1SessionConnected > OnSessionClosed = FtpClient1SessionClosed > OnRequestDone = FtpClient1RequestDone > OnBgException = FtpClient1BgException > Left = 288 > Top = 77 > end > > FTPClient1.connect; > FTPClient1.HostDirName := paramstr(1); > FTPClient1.HostFileName := paramstr(3); > FTPClient1.localfilename := paramstr(2); > if FTPClient1.Cwd() then > begin > if not (FTPClient1.Binary) then > begin > FTPClient1.Binary := true; > FTPClient1.TypeSet(); > end; > FTPClient1.dele; > FTPClient1.put; > > All the FTPClient1 events write to a Tmemo to report the progress/status. > > regards > > David > > -- > To unsubscribe or change your settings for TWSocket mailing list > please goto http://www.elists.org/mailman/listinfo/twsocket > Visit our website at http://www.overbyte.be > -- To unsubscribe or change your settings for TWSocket mailing list please goto http://www.elists.org/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
