VIC

August 15, 2018

DATA CENTER

Fast & Flexible – New 4th Gen Fabric Interconnect and VIC

  Today, guest blogger Nikul Sheth, Sr. Product Manager for Cisco UCS Fabric Interconnect writes about our new 4th gen fabric. Our next evolution of Cisco UCS Fabric provides...

Why is SR-IOV relevant in the HPC world ?

One feature of the usNIC ultra-low latency Ethernet solution for the UCS Cisco VIC that we think is interesting is the fact that it is based on SR-IOV. What is SR-IOV, and why is it relevant in the HPC world? SR-IOV (Single Root I/O Virtualization) is commonly used in the server virtualization world. The most […]

Short message latency and NUMA effects

I’ve previously written a bunch about the effects of location, Location, LOCATION! on MPI applications. Here’s another subtle NUMA effect that a well-tuned MPI implementation can hide from you: intelligently distributing traffic between multiple network interfaces. Yeah, yeah, most MPI implementations have had so-called “multi-rail” support for a long time (i.e., using multiple network interfaces […]

Ultra low latency Ethernet (UCS “usNIC”): questions and answers

I have previously written a few details about our upcoming ultra low latency solution for High Performance Computing (HPC).  Since my last blog post, a few of you sent me emails asking for more technical details about it. So let’s just put it all out there.

Why MPI is Good for You (part 3)

I’ve previously posted on “Why MPI is Good for You” (blog tag: why-mpi-is-good-for-you).  The short version is that it hides the typical application programmer from lots and lots of underlying network stuff; stuff that they really, really don’t want to be involved in. Here’s another case study… Cisco’s upcoming ultra-low latency MPI transport is implemented […]

Ain’t your father’s TCP

TCP?  Who cares about TCP in HPC? More and more people, actually.  With the commoditization of HPC, lots of newbie HPC users are intimidated by special, one-off, traditional HPC types of networks and opt for the simplicity and universality of Ethernet. And it turns out that TCP doesn’t suck nearly as much as most (HPC) […]

Cisco ultra low latency support for MPI

My team demonstrated our new ultra-low latency Ethernet solution in the Cisco booth at SC this past week (it was so busy that I didn’t get to post this until it was all over!). The short version is that we have implemented operating system bypass and NIC hardware offload via the Linux OpenFabrics verbs API […]