Posts Tagged ‘ esxi ’

Bhavesh Davda

Tuning ESXi for NFV Workloads

June 26, 2015
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Network Functions Virtualization (NFV) enables the efficiency and agility benefits that come from untethering network functions from proprietary appliances and moving them to a virtualized infrastructure running over hypervisors and COTS hardware. Enterprise IT departments have been realizing such benefits for a number of years but the telecommunications environment brings new workloads with different requirements. The vSphere ESXi hypervisor provides a high-performance and competitive platform that effectively runs many Tier 1 application workloads in virtual machines. By default, ESXi has been heavily tuned for driving high I/O throughput efficiently by utilizing fewer CPU cycles and conserving power, as required by a wide range of workloads. Telco and NFV application workloads are different from the typical Tier I enterprise application workloads in that they tend to be any combination of latency sensitive, jitter sensitive, high packet...

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Josh Simons

Virtualized High Performance Computing (HPC) at VMworld 2013

August 19, 2013
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It’s been a busy few months on the HPC front here at VMware. I’ve been spending increasing amounts of time answering questions from our field people and talking with customers about the benefits of using virtualization and cloud technologies for HPC workloads. The two hottest application areas are clearly Life Sciences and Electronic Design Automation (EDA), with Financial Services as a third area where serious interest is starting to ramp. Customers in these sectors are actively evaluating or deploying HPC solutions based on VMware technology. Some of this work will be presented at VMworld 2013 August 25-29 in San Francisco. Here are the talks that will be of special interest to organizations whose job mixes include the technical, scientific or engineering...

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Josh Simons

Paravirtual RDMA for Low Latency and Flexibility

December 27, 2012
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The Office of the CTO has been exploring how to best enable application access to RDMA for those applications requiring the ultimate in high bandwidth, low-latency communication, which includes many HPC MPI applications as well as many scale-out databases and BigData approaches. Passthrough mode is the most straightforward way to enable guest-level RDMA. With passthrough (which we call VM DirectPath I/O), a physical PCI device can be made directly visible to the guest operating system running within the virtual machine. We published a research note showing that this approach delivers very good InfiniBand latencies (under 2us) and excellent bandwidths over a wide range of message sizes. There is a downside, however: Punching through the virtual machine abstraction in this way disables several...

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Josh Simons

Virtualization, Italian Style

July 11, 2012
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I’m in Fiuggi, Italy this week teaching a four-lecture course on Virtualization and High Peformance Computing as part of the Eighth International Summer School on Advanced Computer Architecture for High Performance and Embedded Systems ( ACACES 2012 ). I have about 70 students in the class, primarily from European countries.

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Josh Simons

vSphere 5: vNUMA paper now available

October 27, 2011
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I promised in the blog post vNUMA: What it is and why it matters to share the full research paper with you when it became available. It can now be downloaded here . If you find the paper useful, please click to give it a star rating on that same page. As a reminder, here is the paper abstract: A major obstacle to virtualizing HPC workloads is a concern about the performance loss due to virtualization. We will demonstrate that new features significantly enhance the performance and scalability of virtualized HPC workloads on VMware’s virtualization platform. Specifically, we will discuss VMware’s ESXi Server performance for virtual machines with up to 64 virtual CPUs as well as support for exposing virtual NUMA topology...

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Josh Simons

Virtualizing Big Data

October 26, 2011
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Analysis of large-scale, often unstructured data is becoming increasingly important within both the Enterprise and the HPC community. This is perhaps one of the most apparent areas where the convergence of HPC and Enterprise requirements can be seen as the tools and algorithmic approaches required are often the same or very similar. I imagine, for example, that the large-scale, graph-oriented “social network” analyses done by companies like Facebook are quite similar to the “anti-social network” analyses done by Homeland Security and the Intelligence community. Unsurprisingly, many VMware customers are interested in running Big Data workloads and are looking for guidance about how best to do this in a virtual environment. To help, we have published a whitepaper that examines Hadoop performance using local...

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