slow upload speed

0 votes
asked Aug 27 by Ivan (360 points)

Hello,

I need help!

Our customer has an issue with upload speed.
Avg speed = 500-600 kb/sec
If the customer uses another FTP client the upload speed is 5-6 MB.

Please let me know, how the upload speed can be increased?

The full log will be sent to you by email.

FTP-LOG: 2019-08-23 01:20:01.029 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.045 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.107 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.123 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.154 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.154 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.170 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.201 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.216 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.263 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.279 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.279 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.294 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.310 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.341 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.435 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.450 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.482 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.497 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.513 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.513 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.544 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.575 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.622 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.700 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.716 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.731 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.731 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.747 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.778 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.809 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.856 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.872 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.872 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.887 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.918 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.
FTP-LOG: 2019-08-23 01:20:01.918 VERBOSE Ftp(25)[35] Info: Sent 16384 bytes of data through data connection.

Applies to: Rebex FTP/SSL

1 Answer

0 votes
answered Aug 28 by Lukas Pokorny (103,050 points)
  1. Turn off Vebose logging because it slows down transfers a lot.
  2. Enable UserLargeBuffers option to enable larger TCP buffer sizes.
  3. Increase Rebex FTP's upload buffer length from the default value of 16 KB (try different values to see whether they make any difference).

Sample code:

var ftp = new Ftp();
ftp.Settings.UseLargeBuffers = true;
ftp.UploadBufferLength = 128 * 1024;
...
...