Published: (Updated: ) by . Leave a Comment on Understanding QEMU devices.
Not sure where I came across this, but it is an excellent description of QEMU (and virtualization in general). I am very much a fan of this style of technical communication as exemplified in this final summary paragraph (the full article is longer): In summary, even though QEMU was first written as a way of […]
Published: (Updated: ) by . 5 Comments on Create a Linux VM with KVM in 6 easy steps.
A Step-by-step guide to creating a Linux virtual machine on a Linux host with KVM,qemu,libvirt and ubuntu cloud images.
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TL;DR – Some modern Linux distributions use a newer method of identification which, when combined with DHCP can result in duplicate IP addresses when cloning VMs, even when the VMs have unique MAC addresses. To resolve, do the following ( remove file, run the systemd-machine-id-setup command, reboot): # rm /etc/machine-id # systemd-machine-id-setup # reboot When […]
Published: (Updated: ) by . Leave a Comment on Impact of Paravirtual SCSI driver VS LSI Emulation with Data..
TL;DR Comparison of Paravirtual SCSI Vs Emulated SCSI in with measurements. PVSCSI gives measurably better response times at high load. During a performance debugging session, I noticed that the response time on two of the SCSI devices was much higher than the others (Linux host under vmware ESX). The difference was unexpected since all the devices […]