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

Cyberduck trac at trac.cyberduck.ch
Tue Nov 9 18:03:34 CET 2010

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

Comment (by caeies):

 Ok, good to know that :)

 If it can help :
    * I take a look at the sftp stuff (the openssh client) and it seems
 that the window adjust size is around 131072 when yours, in my last, tries
 is around 16384.
    * I have tested message size of 4096 -> 32768 and a chunksize of
 32768*64 and max_parallelism set to 100 I've reached then ~300KB/s.

 If you need more testing, let me know.

 Good luck with the refactorisation of the SFTPv3Client.


Ticket URL: <http://trac.cyberduck.ch/ticket/185#comment:52>
Cyberduck <http://cyberduck.ch>
Open source FTP, SFTP, WebDAV, Cloud Files, Google Docs & Amazon S3 Browser for Mac & Windows.

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