Feb 222014

Having spent a week playing with various features of XenServer (with a focus on automation), I’ve only scratched the surface of what it can do. I have a sense, though, for the power of the system, and what it would take to get it to work at my company. It has all the features that we need to start, some nice-to-have features that we’ll probably use, and then extras beyond that which we probably won’t play with for the foreseeable future. Continue reading »

Feb 022014

I’m starting to dive into choosing from a variety of server virtualization options for work in order to determine which solution to roll into our environments. First up is XenServer, with which I’ll stand up a pool of a couple machines and test out provisioning new servers, live migration, network isolation, and other cool features. While these tasks are more straightforward using the GUI (official GUI is Windows-only, but there are alternatives), I’m spiking out tooling that does as much as possible via the API (since we’ll want to automate it). Continue reading »

Feb 012014

At my job, we have quite a few servers, all on dedicated hardware. Most of our servers relate directly to storing data on disk, and so physical hardware makes sense. For the scores of random, smallish servers, though, physical hardware is overkill. To help manage this inefficiency, we’re looking at various virtualization options, including XenServer, KVM, and containers/jails/zones. Continue reading »

May 142013


At TempoDB, we maintain multiple environments (production, staging, etc), and each environment is in a datacenter (Dallas, Seattle, etc). For the most part, we want strict separation between environments, but we have a growing list of traffic that ought to be allowed to flow between them (see below). We designed a new architectural primitive which allows us to securely permit some traffic, while still blocking everything else. Continue reading »

Jan 092013

(Cross-posted to blog.tempo-db.com)

In addition to our REST API and language-specific client libraries, we now offer the ability to bulk import data by uploading CSVs. The intent of this feature is to support the initial load of large amounts of historical data (many millions or billions of data points). By sending us CSVs (instead of just using our API normally), customers save themselves from having to build and monitor a large one-time job, and the problem is simplified to CSV generation. Continue reading »