Category: Hardware

  • Migrating VMs from pure paravirt hypervisor to hvm-capable hypervisor

    I’m also changing all of my disk layouts from being block devices per each guest partition to one block device hypervisor side per each /dev/xvd* guest side. The block devices all live on a single storage server and are being served via iSCSI. One of the guests is making use of AoE, but I’m thinking […]

  • Replaced hypervisor

    The system which was hosting this blog had a tendency to go down every few days. I swapped it out for a spare yesterday. Let’s see if it stays up. The hypervisor hosts this web server, a mysql server and an SKS pool member, all of which are built on top of Squeeze.

  • F5 opens second International Technology Center in London

    Very cool. Presided over by my friend and the VP of our group, Erik Giesa. Notably lacking is the inclusion of a picture of Steve Mitchell’s smiling face. The first of our ITCs is here in Seattle. We’ve got some space on our internet site dedicated to them:

  • SJCARS blog

    The San Juan County Amateur Radio Society (SJCARS) has created a blog. I’m excited.

  • Taking a position at F5

    Hello readers, I recently finished a contract with Liquid Web helping them to build their cloud computing system. The next adventure will be with F5 as a Product Management Engineer. I’ve been hearing good things about F5 hardware since 2000 when Matt Fisher talked up the Big IP he had been using. My friends in […]

  • Putting new radios up in Everett

    I’m happy to note that we’re putting up new radios in Everett. The plan is to provide free but limited Internet access to neighbors and sell service to those who need a “fatter pipe” as the kids say. We’ve been running a repeater for over a year now. It doesn’t provide access to the Internet, […]

  • AoE root for KVM guests

    Intro So. I’m trying to get familiar with libvirt and friends. To this end, I’ve set up a Lucid virtual machine booting from PXE into an initrd environment which does a pivot_root to an AoE block device. The #virt channel on told me that in order to have libvirt provide PXE capability, I would […]

  • Xen PV network driver

    I haven’t used Xen HVM until recently. When I was at Amazon and hanging with the Xen provisioning folks, I recall complaints about the performance of network drivers on HVM instances. I’ve recently discovered that this was due to the use of the ioemu virtual interface (vif) system. In paravirtualized environments, Xen vif devices are […]

  • Well, that was an eventful day!

    *whew* I did a bunch of things yesterday. We took our kindergärtner to her first Friday at her new school (and were about 10 minutes tardy. oops). We then took our toddler to a nearby playground with swings and slides and let her expend some energy. After she had been sufficiently exercised, we walked back […]

  • Sorry for the downtime

    One of my servers (and co-incidentally, the one on which this blog is hosted) was down for the last week. I ran out of space on / and created a new lv to store the contents of /usr. I named the lv dom0-usr but referred to it as amd0-usr in /etc/fstab. It didn’t boot so […]