Recommendations for Virtualization Technologies in High Performance Computing Summarized by Michael Riera 9 17 2011 University of Central Florida CDA5532 Papers in discussion Recommendations for Virtualization Technologies in High Performance Computing Nathan Regola Center for Research Computing Notre Dame Jean Christophe Ducom Center for Research Computing Notre Dame The Architecture of Virtual Machines James E Smith University of Wisconsin Madison Ravi Nair IBM T J Watson Rsearch Center Understanding Performance Interference of I O Workload in virtualized Cloud Environments Xing Pu Ling Liu Yiduo Mei Sankaran Sivathanu Younggyun Koh Calton Pu Georgia Tech Beijing Institute of Technology P R China Xi an Jiaotong University P R China Agenda Purpose OpenVZ KVM Xen EC2 Running Xen Benchmarks Experiment Setup Evaluation Results Purpose This paper evaluates three well known source VMM hypervisors on there disk throughput read write ops round trip latency and relative running time OpenVZ KVM Xen including Amazon EC2 OpenVZ Is a modified Linux kernel that is enabled to act as a VMM Allows Linux based OS to run as processes One Kernel on the host to support both host and client Single Point of failure for guest and host failures Lower CPU overhead because each VM is a process KVM 10 000 Lines of Code that turns a Linux distribution into a VMM by loading a kernel module Leveraging existing Linux infrastructure I O Stack Device Drivers memory manager scheduler Enables Guess Mode for other Linux kernels Virtio driver Enables para vitualization therefore allowing VM to request access for computations to be made on a host computer Enables PCI passthrough Xen including EC2 Loosely coupled from the VM running Supports Multiple OS distributions including Solaris Windows BSD and Linux VM Domain Isolation Cannot be used to attack an operating system e g Xen cannot attack the host operating system as there is no host operating system to attack outside the memory space Privileged Access Small Code Base Supports Para virtualization Benchmarks Auction Benchmarks through RUBIS For High enterprise workload NAS Parallel benchmark NPB A suite that emphasizes a particular type of numerical computation and reproduces the CPU cache memory and I O system workload of a wide range of real world apps Consist of five kernels workloads EP MG CG FT IS Consist of three complex fluid dynamics CFD applications BT SP LU OpenMP Benchmark OpenMP Microbenchmarks MPI Benchmark Intel MPI Benchmark 3 2 2 Experiment Setup Consist of Four identical Dell R610 machines each with two 2 27 Ghz Intel Xeon E5520 processor quad core 24GB of RAM GB Nic card and Infiniband Qlogic 7240 Host Operating system Fedora 12 VMM OpenVz KVM Xen Host VM on OpenVz 13 Linux Kernel 2 6 18 Host VM on KVM 13 Linux Kernel 2 6 32 Host VM on Xen 3 4 3 2 13 Linux kernel between 2 6 32 1 2 108 Guess virtual machines operating system Redhat 5 4 Evaluation and Results KVM Leads because of the para virtualization for reads random but doesn t help for writes and random writes Evaluation and Results EC2 native Hyperthreading Evaluation and Results Evaluation and Results Evaluation and Results