[Halld-offline] expected bandwidth offsite

[Curtis A. Meyer]

Hi Matt -

  I think that is few times better than what we do with a 1GB for the last 200 feet or so,

Curtis
---------
Curtis A. Meyer			MCS Associate Dean for Faculty and Graduate Affairs
Wean:    (412) 268-2745	Professor of Physics
Doherty: (412) 268-3090	Carnegie Mellon University
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curtis.meyer at cmu.edu	http://www.curtismeyer.com/



> On May 16, 2016, at 2:23 PM, Shepherd, Matthew <mashephe at indiana.edu> wrote:
> 
> 
> Hi Sandy,
> 
> (cc'ed to offline list in case anyone also cares about this topic or has input.)
> 
> I copied about 10 TB of GlueX data (a calibration skim) from JLab to our machine here at Indiana.  I used the web-based globus-connect system.  
> 
> The source at JLab was:
> 
> expphy/cache/halld/home/gxproj3/calib/GlueX-CalibRun-2016-04-04/
> 
> The transfer took about 2.5 days (5/12 - 5/14) and when complete I had averaged 49 MB/s.
> 
> 49 MB/s (roughly 400 Mb/s) is not too shabby, but I'd like to know what you think we might be able to get going offsite.
> 
> Here, we've got 10 gigabit everywhere:  fiber coming into a switch and then into 10 gigabit interface cards.  Some informal local testing has produced speeds in the neighborhood of about 3-4 Gb/s, roughly ten times what I got from JLab.  However, that doesn't necessarily rule out a bottleneck somewhere outside the lab.
> 
> The transfer rate is acceptable, but I thought I'd ask in case there is some obvious things we can do to get a few factors speed up.  
> 
> Matt
> 
> ---------------------------------------------------------------------
> Matthew Shepherd, Associate Professor
> Department of Physics, Indiana University, Swain West 265
> 727 East Third Street, Bloomington, IN 47405
> 
> Office Phone:  +1 812 856 5808
> 
> 
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