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this should have been sent to <a class="moz-txt-link-abbreviated" href="mailto:go-essp-tech@ucar.edu">go-essp-tech@ucar.edu</a><br>
<br>
sorry about that.<br>
<br>
Karl<br>
<br>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Subject: </th>
<td>download rates</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">Date: </th>
<td>Wed, 2 Mar 2011 16:43:42 -0800</td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">From: </th>
<td>Karl Taylor <a class="moz-txt-link-rfc2396E" href="mailto:taylor13@llnl.gov"><taylor13@llnl.gov></a></td>
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<th align="RIGHT" nowrap="nowrap" valign="BASELINE">To: </th>
<td><a class="moz-txt-link-abbreviated" href="mailto:esg-support@earthsystemgrid.org">esg-support@earthsystemgrid.org</a> Grid
<a class="moz-txt-link-rfc2396E" href="mailto:esg-support@earthsystemgrid.org"><esg-support@earthsystemgrid.org></a></td>
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<font face="Times New Roman">Hi all,</font><font face="Times New
Roman"><br>
<br>
When I download a 25 MB CMIP5 file from BADC using the wget
method:<br>
* it took 35 sec to get started<br>
* then it downloaded at an average rate of 1.1 MB/min<br>
<br>
When I download the same file using the point and click method:<br>
* it took 20 sec to get started<br>
* then it downloaded at an average rate of 1.4 MB/min<br>
<br>
When I download 4 files simultaneously (in parallel) using the
click method, I get somewhat slower download rate per file, so
somewhat less than 4 times the data transfer rate I would have
gotten downloading them in series.<br>
<br>
Note that at 1 MB/min, I could download 1 GB in about 17 hours or
1 TB (i.e., about 1/1000 of the entire archive) in about 2 years.
<br>
<br>
Any way to speed this up some? (A colleague here downloads files
at about 10 times this rate from ECMWF.)<br>
<br>
</font><font face="Times New Roman">Note that I haven't checked how
fast download rates are from nodes published to our (PCMDI's)
gateway (since they are not yet publicly available).</font><br>
<font face="Times New Roman"><br>
Best regards,<br>
Karl<br>
<br>
<br>
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