<div dir="ltr">Buffer Bloat? <a href="http://www.bufferbloat.net/projects/bloat/wiki/Introduction">http://www.bufferbloat.net/projects/bloat/wiki/Introduction</a></div><div class="gmail_extra"><br><br><div class="gmail_quote">
On Tue, Jul 23, 2013 at 11:33 PM, Alex Mandel <span dir="ltr"><<a href="mailto:tech_dev@wildintellect.com" target="_blank">tech_dev@wildintellect.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">
Can someone explain why a large file transfer might slow over time<br>
between 2 machines on the same switch, or even over a local network.<br>
<br>
My coworkers and I have experienced this independently with Windows<br>
Copy, SCP, SFTP.<br>
<br>
Example, a file transfer starts at 40 M/s but eventually ends up in the<br>
1-5 M/s speed range. Though I did trick it into parallel with lftp and<br>
managed to get a sustained 16 M/s (2-3 simultaneous connections).<br>
<br>
My only suspicion right now is encryption (maybe disk speed?), but I'm<br>
looking for ideas of things to explore to ensure better QoS. If you<br>
didn't pick up on it, this isn't a home network, it's university, and<br>
everything is Gigabit wired. File sizes are in the 1-200 GB range.<br>
<br>
Thanks,<br>
Alex<br>
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</blockquote></div><br></div>