I mentioned in previous post that collectd uses rrdtool for saving its data by default. It results
.rrd file for each metric, which later can be rendered using very same rrdtool. RRD files are not something most of the people are familiar with and the tool itself isn’t particularly easy to use, so why such an easy to use tool as collectd would choose it?
For a number of reasons. Continue reading “Quick intro to rrdtool”
Distributed apps introduce a challenge that we usually could avoid in monolithic ones: how do we say that app is performing well? I’m not talking about it being user-friendly or providing business value. How do you tell that components of your distributed app are actually running? Which services are overutilized? Underutilized? Run out of disk space?
There’re tools to get that answers and collectd is one of them.
Continue reading “Host monitoring with collectd”