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<p style="margin-top:0; margin-bottom:0">Just to break an ice on this topic, what kind of disk is on a PC that you are transferring the data to? It's been mentioned in one of the
<a href="https://www.youtube.com/watch?v=NabTsYl_mIQ&list=PLohLhg8SlVmbG8W_TFIWQFFhg1LJ0-xf1" class="OWAAutoLink" id="LPlnk186991" previewremoved="true" tabindex="-1" disabled="true">
latest DDN videos</a> that no matter how big is your bandwidth, you'll be disk IO limited if your storage can't support enough IOPS (<a href="https://en.wikipedia.org/wiki/IOPS" class="OWAAutoLink" id="LPlnk502046" previewremoved="true" tabindex="-1" disabled="true">https://en.wikipedia.org/wiki/IOPS</a>).
Maybe getting an SSD might solve this bottleneck, if I understand the problem correctly.<br>
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<div><span id="ms-rterangepaste-start"></span><span>Respectfully,</span><span id="ms-rterangepaste-end"></span><br>
Sargis Dallakyan, PhD - Systems Administrator<br>
National Resource for Automated Molecular Microscopy<br>
Simons Electron Microscopy Center<br>
New York Structural Biology Center<br>
<a title="http://emg.nysbc.org/redmine/users/105" href="http://emg.nysbc.org/redmine/users/105" id="LPNoLP" tabindex="-1" disabled="true">http://emg.nysbc.org/redmine/users/105</a></div>
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<div class="PlainText">Date: Tue, 16 Oct 2018 16:15:00 +0300<br>
From: Eugene Pichkur <eugene.pichkur@gmail.com><br>
To: 3dem@ncmir.ucsd.edu<br>
Subject: [3dem] Falcon II uses only half of the 1Gb/s bandwidth.<br>
Message-ID:<br>
<CAJJJP0=9cSHBRxKLOQkaYmqvg3X6Ym4iq-DT_oMCvNYERErr4w@mail.gmail.com><br>
Content-Type: text/plain; charset="utf-8"<br>
<br>
Hello 3DEM community,<br>
<br>
We've noticed that our Falcon II uses only half of the 1Gbps bandwidth to<br>
transfer data from the Camera Support Rack to the Microscope PC (I've<br>
attached a screenshot to illustrate the issue).<br>
<br>
Microscope PC runs Windows 7 and we are able to get the full frame rate<br>
(20fps) from the detector, however, it takes ~20s to transfer a typical<br>
movie (40frames, 1.2GB) to the PC which is a very frustrating bottleneck.<br>
<br>
Both Falcon II and Ceta are connected through the same 1Gb switch (HPE<br>
OfficeConnect 1420 24G 2SFP), so my guess is that the bandwidth is split<br>
50/50. However, during data collection only Falcon II is used which makes<br>
this limitation pointless, not to mention that Falcon II and Ceta can't be<br>
used simultaneously.<br>
<br>
Does anyone have a workaround or any info on the topic?<br>
<br>
<br>
Thanks in advance,<br>
Eugene Pichkur<br>
<br>
National Research Centre ?Kurchatov Institute?<br>
Akademika Kurchatova, 1, Moscow, Russia, 123098<br>
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