A Precautionary Tale for Graphite Users

2012-05-02 22:09:36 by jdixon

This morning I was collecting some graphs for one of our weekly status meetings. Asked to find something that represented the state of our Graphite system, I naturally gravitated to my usual standbys, "Carbon_Performance" (top) and "Carbon_Inbound_Bandwidth" (bottom).

1-day1-week

The SysAdmin in me loves these because they highlight resource utilization on the server. While the former details disk I/O and CPU, the latter tracks inbound bandwidth in terms of bits and packets per-second. Although the network graph seems utterly boring (in as much as we've all used these in one form of another, from vendor-supplied dashboards to Cacti installations), it's this one that is actually the more complicated of the two to configure.

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Passing Fail

2009-09-29 14:19:01 by jdixon

I've heard all sorts of stereotypes about bad drivers. Usually they're racist or sexist (or both). And although it's politically incorrect to agree with them, there's almost always a sliver of truth hidden inside. But it's pretty rare to hear a specific criticism about an entire state of drivers (other than "they suck").

Maryland drivers are quickly gaining a reputation for cruising in the Passing Lane. This might sound like a minor gripe, but you have to consider that the entire state of Maryland is the size of a pimple on Virginia's forehead. Most of the highways are two- or three-lane affairs, not including interstate 95 or the Baltimore and DC perimeters. Monopolizing the Passing Lane can have a significant affect on the normal flow of traffic, and not just during rush hour.

Sometimes I try to consider what they might say if I confronted one of them. I bet they would argue that "I'm already going the speed limit in the fast lane, you're just trying to go faster. You're the unsafe one!". Therein lies the crux; it's not a fast lane, it's a Passing Lane (excessive and redundant emphasis mine). There's nothing subjective about the intended purpose of that lane. It's intended for passing slower traffic. It's not there as your personal safety zone, and it's certainly not yours to do with as you please. You're free to use it for the purposes of Passing vehicles. Once that's over, GTFO of my way.

That is all. Safe motoring, everyone.