<div dir="ltr"><br><div>Thanks, Gerald - I'll be reading this shortly. And to add to any discussion, here's the Blue Waters container paper that I like to point people towards - from the same conference, in fact:</div><div><a href="https://arxiv.org/pdf/1808.00556.pdf">https://arxiv.org/pdf/1808.00556.pdf</a><br></div><div><br></div><div>The key thing here is achieving <i>native</i> network performance through the MPICH ABI compatibility layer[1]. This is such a key technology. Prior to this, I was slightly negative about containers, figuring MPI compatibility/performance was an issue - now, I'm eager to containerize some of our applications, as it can dramatically simplify installation/configuration for non-expert users.</div><div><br></div><div>One thing I'm less certain about, and would welcome any information on, is whether things like Linux's cross-memory attach (XPMEM / CMA) can work across containers for MPI messages on the same node. Since it's the same host kernel, I'm somewhat inclined to think so, but I haven't yet had the time to run any tests. Anyway, given the complexity of a lot of projects these days, native performance in a containerized environment is pretty much the best of both worlds.</div><div><br></div><div>[1] MPICH ABI Compatibility Initiative : <a href="https://www.mpich.org/abi/">https://www.mpich.org/abi/</a></div><div><br></div><div>Cheers,</div><div> - Brian</div><div><br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 22, 2019 at 7:10 AM Gerald Henriksen <<a href="mailto:ghenriks@gmail.com">ghenriks@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">Paper on arXiv that may be of interest to some as it may be where HPC<br>
is heading even for private clusters:<br>
<br>
Evalutation of Docker Containers for Scientific Workloads in the Cloud<br>
<a href="https://arxiv.org/abs/1905.08415" rel="noreferrer" target="_blank">https://arxiv.org/abs/1905.08415</a><br>
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