Anastassios Nanos
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I'm working on building a lightweight, ultra-performant hypervisor for x86 and ARM architectures.

Lightweight Apps

I'm also looking into unikernels, and how this technology can facilitate deployment of cloud-native apps, without sacrificing performance, isolation, and security.

Hardware Acceleration

Accelerating parts of an application can really boost performance. But is it something we can easily do without being too intrusive to the application code? Can we do that in the cloud? I'm working on getting (some of) these answers.


Various projects I've been involved in.

Memory Elasticity

Decouple memory-oriented workloads from OS memory concepts

Lightweight Applications

Strip down the OS stack

Hardware Acceleration

Expose function acceleration semantics to cloud workloads

Short Bio

Download a more detailed CV.

  • Jul 2018-

    Researcher / Systems Engineer

    Architecting, implementing, and optimizing a state-of-the-art hyperconverged hypervisor stack that achieves extreme storage and network performance.

  • Feb 2015-Jun 2018

    Researcher / Systems Engineer

    OnApp Ltd.

    Conducting research in emerging, power-efficient micro-server architectures on scalable network and storage I/O, and energy-driven resource management in Cloud architectures. This work consists of designing and implementing low-level hypervisor and OS mechanisms to provide applications efficient, isolated, and secure access to hardware resources.

  • May 2014-Jan 2015

    Postdoctoral Research Fellow

    CSLab, ECE, NTUA

    Worked on I/O Virtualization, systems software for high-performance I/O in virtualized environments, communication architectures for clusters, and scalable storage architectures based on clusters.

  • Dec 2013

    PhD in Computer Engineering

    CSLab, ECE, NTUA

    Efficient I/O Device Sharing in Virtualized Environments.
    As HPC applications scale to a large number of VMs, providing near-native network I/O performance to each peer VM is an important challenge. In this work, we present Xen2MX, a paravirtual interconnection framework, based on the Open-MX protocol, a port of the Myrinet/MX over generic Ethernet adapters. Experimental evaluation of our prototype implementation shows that Xen2MX is able to achieve nearly the same aw performance as Open-MX running in a non-virtualized environment.

  • Jul 2013-Jan 2015

    Co-founder & Systems Engineer Inc

    Design, develop, deploy and maintain the company's product. is about cloud server management, monitoring and automation across multiple cloud providers from any web device. Code developing was in python, Javascript and bash.

  • Sep 2011-Mar 2012


    Maxeler Technologies Ltd.

    Worked on porting the company's custom FPGA boards to virtualized environments. As my task was completed quickly, I joined the hardware group working on the company's new product line (MPCX), doing performance evaluation at first as well as kernel developing for the board's interface driver and the networking stack (Infiniband)

  • Jan 2011-Dec 2013

    Systems Engineer

    Served as a systems engineer, deploying, administering and maintaining the company's infrastructure both on bare-metal servers (co-located) as well as cloud servers (mostly Amazon EC2).

  • Apr 2007-Dec 2013

    Junior Researcher

    CSLab, ECE, NTUA

    For the purpose of my PhD thesis, I worked on scalable block-level storage systems, communication architectures for clusters, custom 10gigE interconnection frameworks and I/O Virtualization.

  • Nov 2006

    Dipl. Eng.


    Design and impementation of a mechanism transfering data from storage devices to Myrinet networks bypassing the memory hierarchy.
    The objective of this study is the design and implementation of a framework that transfers data from local storage devices to Myrinet networks, bypassing the memory hierarchy of the system. Data flow from the storage device to the network, without the touching the host's memory subsystem.

  • Oct 2005-Sep 2010

    Senior Unix/Linux Administrator


    Set up the entire lab (25-30 workstations, 5 servers), migrated from Solaris/SunOS 4.3 to Debian GNU/Linux, and maintained the lab which featured a fully autonomous setup, able to provide the necessary software for students to work on ECE school's projects.

  • May 2004-Sep 2004

    Unix Engineer

    PC Systems SA

    Served as backend support for the company's clients, mostly Solaris and some Linux-based setups.


Anastassios Nanos

Researcher / Systems Engineer

With over 12 years of experience in Virtualization technologies I am currently working on the lower-level parts of the stack to attack issues related to performance, scalability, power-efficiency and security in hypervisors. Previously, I was a Post-doc at CSLab, NTUA, working on bridging the gap between common HPC practices and virtualization. My research interests include I/O Virtualization, systems software for high-performance I/O in virtualized environments, systems support for heterogeneous platforms, communication architectures for clusters, and scalable storage architectures based on clusters. I have been involved in many parts of the OS software stack, including device drivers, memory management, network/block layers. I hold a Diploma in Engineering (2006) from ECE, NTUA and a PhD in Computer Engineering (2013) from NTUA. Since 2011, I serve as a co-chair of the VHPC workshop series, held in conjunction with Europar, SC, and ISC.

Contact Me

I would love to hear from you.