Cyberduck Mountain Duck CLI

#9603 closed enhancement

Uncomfirmed Reads are Unbounded — at Version 2

Reported by: jbaranick Owned by: dkocher
Priority: normal Milestone: 5.0.9
Component: sftp Version: 5.0
Severity: normal Keywords:
Cc: Architecture:

Description (last modified by jbaranick)

If the file being downloaded is very large the number of unconfirmed reads is effectively unbounded. For example, when the file is 1.3GB, the number of unconfirmed reads is set to 39K. This results in the client submitting 39K calls to the server, updating the progress to look like the download is done, and then failing when some of the calls don't get responses in time. As far as I can tell, there is no way for the server to push back against these requests. As such, Cyberduck should limit the number of unconfirmed reads to something more reasonable, for example 1K.

FYI, the command like SFTP client supports 64 unconfirmed requests by default:

~ ❯❯❯ sftp -R                                                                                                                
 -- number of outstanding requests (default: 64) --

Change History (2)

comment:1 Changed on Jun 20, 2016 at 6:17:03 PM by dkocher

  • Milestone set to 5.1
  • Owner set to dkocher
  • Status changed from new to assigned

comment:2 Changed on Jun 20, 2016 at 6:19:13 PM by jbaranick

  • Description modified (diff)
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