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

[Cyberduck]

#185: Slow SFTP transfers
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    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                   |  
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Comment (by dkocher):

 Replying to [comment:68 caeies]:
 > Replying to [comment:66 dkocher]:
 > > Replying to [comment:62 caeies]:
 > > > Ok reading you code, I think that the main problem is that you are
 waiting for the ACK before continuing to send data, while openSSH just
 send stuff as fast as it can until he fills the queue, then check for ACK
 when the sent queue is filled ...
 > >
 > > I don't see how the patch attached changes this behaviour. It will
 still toggle between writing and reading the status.
 >
 > Yes, but after ''parallelism'' requests only. So it doesn't wait for the
 network latency just after sending the first request and so on ... it will
 read back the answer only after the 64th requests, so when the server
 starts to reply to the requests and that the requests are back to the
 client.

 Commited upload parallelism with ACK queuing in r7598.

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Ticket URL: <http://trac.cyberduck.ch/ticket/185#comment:76>
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