Routing was down 10% and switching 5%.
I’ve written a fair amount about Open vSwitch (OVS), including some articles on using it with KVM and Libvirt. One thing I haven’t discussed in such environments, though, is the potential challenge of mapping network interfaces in a guest domain to the corresponding OVS interface (for the purposes of troubleshooting, for example). There is no single command that will provide a guest-to-OVS interface map (as far as I know), but this information is easily gathered using a couple commands.
First, we’ll need to gather some information about the interface from the guest domain’s perspective. There are two ways we can do this: from within the guest OS itself, or by interrogating Libvirt.
Inside the guest domain (I’m assuming you’re using a relatively recent Linux distribution), you only need to use standard commands like ip link list
or ip addr list
. The goal is to obtain the MAC address assigned to the particular guest interface. So, for example, if you wanted to get the MAC address for the guest “eth0” interface, you’d run:
ip link list eth0
To isolate only the MAC address from the output of that Continue reading
Cacti is a “complete network graphing solution” according to their website. It has also been a thorn in my side for a long time.
See what I did there? Thorn… because it’s a cactus… never mind.
When Cacti is in a steady state–when I could get it to a steady state–it was good. Not great, because there was a lot of effort to get it into what I consider “steady state”, but good. The rest of the time… thorny.
There are five major things that have driven me up the wall. In no particular order:
The concept behind RRD is cool: a fixed-size, circular database (oldest data overwritten by the newest data) makes good sense for the type of data that a network graphing solution collects. In practice, using RRD means:
The new offering will focus on cloud applications running at scale.
In the fall of 2016, I was just beginning my job search. I’d been lucky to lead HR at a number of great cutting-edge technology start-ups, and I was looking for my next adventure. I wanted to find a company that wasn’t just a great business--I wanted one that was also making a positive impact on the world, and one that had a mission I felt passionately about.
During my two decades running HR/People organizations, I’ve spent a lot of time working with--and talking to--parents in the workplace. I’ve been motivated to do so for a few reasons. According to the US census, mothers are the fastest-growing segment of the US workforce. Companies struggle to retain talented workers after they’ve become parents, especially mothers. It’s been reported that 43 percent of highly qualified women with children leave their careers. Millennials (who make up the majority of the US workforce) are reporting that they want to be more engaged parents and are placing a high value on companies that allow them to parent and still get promoted. Ultimately, I’ve come to believe that the skills you acquire while parenting are extremely relevant and valuable to the workforce.
So when Path Continue reading