Bugs item #3517451, was opened at 2012-04-13 03:21
Message generated for change (Comment added) made by bagder
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Category: SCP/SFTP
Group: wrong behaviour
Status: Open
Resolution: None
Priority: 5
Private: No
Submitted By: Daniel Theron (blackcat101)
Assigned to: Daniel Stenberg (bagder)
Summary: cURL with sftp strange behaviour after connection drop

Initial Comment:
Hi there,

Not sure if its the right place to log this ticket because it seems to be the libssh2 package affecting cURL.

I created a 70mb file and transferred it using the command below:
curl --connect-timeout 1 --retry 1 -# -k -u athed:Helpme12 -T file14 sftp://172.21.2.232/

The file sftp speed was about 2 seconds per 10% completion while transferring (+- 20 seconds for 100% completion)

When a connection drop occurred while transferring, cURL's progress bar paused. When the connection came up again, cURL resumed the transfer but the transfer speed changed to a slower speed of +- 5 seconds per 10% completion.

Hope you will be able to duplicate this strange occurance. I was able to duplicate this everytime :)

 $ uname -a
SunOS V240-rd-2 5.10 Generic_147440-12 sun4u sparc SUNW,Sun-Fire-V240

$ curl --version
curl 7.25.0 (sparc-sun-solaris2.10) libcurl/7.25.0 OpenSSL/1.0.1 zlib/1.2.6 libidn/1.24 libssh2/1.4.1
Protocols: dict file ftp ftps gopher http https imap imaps pop3 pop3s rtsp scp sftp smtp smtps telnet tftp
Features: IDN IPv6 Largefile NTLM NTLM_WB SSL libz TLS-SRP

Thanks,
Daniel

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>Comment By: Daniel Stenberg (bagder)
Date: 2012-05-06 15:20

Message:
This sounds like a libssh2 problem. Any chance you can try to repeat this
strangeness with a libssh2 example code and then take the problem to the
libssh2-devel if it remains?

It could be related to the "read-ahead" system libssh2 is using with SFTP.

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Received on 2012-05-07