> I increased the send buffer to 40k. Of course it works only during > active connections. it does not help.
Have you tried to increase BLOCK_SIZE of the DataSocket and BufSize (in TCustomWSocket.Create) of TWsocket's internal send buffer? They both are set to 1460 by default . Means a file is read in chunks of BLOCK_SIZE and BufSize is the maximum amout of data being sent in a single call to socket send(). I think they should be set to a multiple of the optimal MTU value - 28 (protocol data), and lower than the socket send buffer size (default = 4096). The default MTU value of 1500 is often to high in most environments, I use MTU 1492, however wireless may require even a lower value. > No, there is no FW. As I said with a different component on the same > PC using same connection and same server I do not experience the > problem. I don't know how the INDY components work, however they will most likely send the files differently, and they use blocking winsock API which may require different parameters? -- Arno Garrels [TeamICS] http://www.overbyte.be/eng/overbyte/teamics.html Fias Norbert István wrote: > No, there is no FW. As I said with a different component on the same > PC using same connection and same server I do not experience the > problem. > > The problem is that Indy sends a large amount TCP segments as the > received window increasing and as no drop occured while ICS FTP > client does not increase the number of sent segments, so the > unacknowledged amount of bytes is not increasing. > > I am using mobile network - HSDPA - RTT is much higher than in a LAN > environment. That's why I thought that if I increase the send buffer > that could help. I tried the following just for test: > > > In procedure TCustomFtpCli.DataSocketPutSessionAvailable > > //original lines > OptLen := SizeOf(SndBufSize); > if WSocket_getsockopt(FDataSocket.HSocket, SOL_SOCKET, > SO_SNDBUF, > @SndBufSize, OptLen) = SOCKET_ERROR then > begin > HandleError('winsock.getsockopt(SO_SNDBUF) failed'); > Exit; > end; > //original ends > > //added these lines > msg := Format('Send buffer Size> %d', [SndBufSize]); > > > if Assigned(FOnDisplay) then FOnDisplay(self, msg); > > SndBufSize := 8192 * 5; > > if (SetSockOpt(FDataSocket.HSocket, SOL_SOCKET, SO_SNDBUF, > @SndBufSize, optlen) <> NO_ERROR) > then begin > HandleError('winsock.getsockopt(SO_SNDBUF) failed'); > Exit; > end; > > if WSocket_getsockopt(FDataSocket.HSocket, SOL_SOCKET, > SO_SNDBUF, > @SndBufSize, OptLen) = SOCKET_ERROR then > begin > HandleError('winsock.getsockopt(SO_SNDBUF) failed'); > Exit; > end; > > msg := Format('Send buffer Size> %d', [SndBufSize]); > //addition ends > > I increased the send buffer to 40k. Of course it works only during > active connections. it does not help. > > > > -----Original Message----- > From: [EMAIL PROTECTED] > [mailto:[EMAIL PROTECTED] On Behalf Of Arno Garrels > Sent: Wednesday, February 27, 2008 12:16 PM > To: ICS support mailing > Subject: Re: [twsocket] FTPClient Put problem > > I once tested uploading a 2 GB file at 44 Mbits/s in a 100 Mbit/s LAN. > Write ahead cache was disabled at the Server's HDD and the > the disk seemed rather busy, the HDD was probably the bottleneck > that avoided higher speeds. > > Make sure you do not have any anti-virus software or a personal > Firewall running, customers frequently reported that upload speed > increased heavily when they killed their background protection. > > -- > Arno Garrels [TeamICS] > http://www.overbyte.be/eng/overbyte/teamics.html > > > > Fias Norbert István wrote: >> Honestly I did not find the answer for my following question int he >> archieves, buti t can be I missed something. >> >> I have the following problem >> In case of upload with FTPClient the upload is slow. It seems that >> the client does not send enough fast the TCP segments. I mean it is >> waiting for the previous ACK. The receive window size ont he servers >> ide is big enough. No bandwidth limit int he client. Is this problem >> related to winsock, or can I do anything againts? Can I increase the >> send buffer size of the data socket? >> >> I do not experience the problem with Indy FTP client / same machine, >> same connection, same server. >> >> Thanks in advance, >> Norbert >> >> ________________________________ >> >> >> Magyar Telekom Távközlési Nyilvánosan Működő Részvénytársaság >> Székhely: 1013 Budapest, Krisztina krt. 55. >> Cégjegyzékszám: bejegyezve a Fővárosi Bíróság mint >> Cégbíróságon Cg. 01-10-041928 szám alatt >> >> >> Magyar Telekom Telecommunications Public Limited Company >> Registered office: H-1013 Budapest, Krisztina krt. 55. >> Commercial register: The Company was registered >> on number 01-10-041928 by the Municipal Court as Court of >> Registration > -- > To unsubscribe or change your settings for TWSocket mailing list > please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket > Visit our website at http://www.overbyte.be > > > > Magyar Telekom Távközlési Nyilvánosan Működő Részvénytársaság > Székhely: 1013 Budapest, Krisztina krt. 55. > Cégjegyzékszám: bejegyezve a Fővárosi Bíróság mint > Cégbíróságon Cg. 01-10-041928 szám alatt > > > Magyar Telekom Telecommunications Public Limited Company > Registered office: H-1013 Budapest, Krisztina krt. 55. > Commercial register: The Company was registered > on number 01-10-041928 by the Municipal Court as Court of Registration -- To unsubscribe or change your settings for TWSocket mailing list please goto http://lists.elists.org/cgi-bin/mailman/listinfo/twsocket Visit our website at http://www.overbyte.be
