[Cyberduck-trac] [Cyberduck] #185: Slow SFTP transfers

Cyberduck trac at trac.cyberduck.ch
Tue Nov 9 22:47:37 CET 2010

#185: Slow SFTP transfers
    Reporter:  wout.mertens@…          |        Owner:  dkocher      
        Type:  enhancement             |       Status:  closed       
    Priority:  high                    |    Milestone:  4.0          
   Component:  sftp                    |      Version:  3.5          
    Severity:  major                   |   Resolution:  fixed        
    Keywords:                          |     Platform:  Mac OS X 10.6
Architecture:  Intel                   |  

Comment (by caeies):

 Replying to [comment:58 dkocher]:
 > Replying to [comment:55 caeies]:
 > > Hum just another guess.
 > >
 > > Do we have the same problem when uploading files?
 > OpenSSH does not use parallel requests there from what I know but one
 could try if sending multiple write requests in a batch and reading status
 later would make a difference there, too.

 Are you sure ? I just made a quick try and the window size is the same as
 for download one, and the window is increased at the beginning of the
 And answers come from the server only after 73 requests have already been
 sent ...
 Size of the write is 32768 per SSH2_FXP_WRITE message If this can help.

Ticket URL: <http://trac.cyberduck.ch/ticket/185#comment:61>
Cyberduck <http://cyberduck.ch>
Open source FTP, SFTP, WebDAV, Cloud Files, Google Docs & Amazon S3 Browser for Mac & Windows.

More information about the Cyberduck-trac mailing list