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Goal is a bit different. Vector doesn't collect and persist metrics. We needed something that had as little overhead as possible so it could be deployed to all
by mspier 11y ago
Goal is a bit different. Vector doesn't collect and persist metrics. We needed something that had as little overhead as possible so it could be deployed to all our hosts and simplify the process of analyzing those metrics.
- falcolas 11y agoNeither does collectd, it just gathers and transmits the data to an endpoint you specify. It's also quite lightweight (once you address the memory leaks, at least).
- toomuchtodo 11y agoIf its not collecting and persisting metrics, is it more of a glorified htop?
- davidu 11y agoWait, really? Why not? Storage is cheap. Do you use something else to get historical visibility into metrics?
- toomuchtodo 11y agoGrafana, Graphite, StatsD, Skyline.
- zantana 11y agoI think the reason is they have a bunch of ephemeral hosts which they don't want to put in a central web interface or collect statistics on. They are only interested in getting some insight as to what went wrong with this host so they can fix it in the future.
- brendangregg 11y agoYes, Atlas, which is also open source: http://techblog.netflix.com/2014/12/introducing-atlas-netflixs-primary.html http://techblog.netflix.com/2014/12/introducing-atlas-netfli... . Atlas monitors cloud-wide, and stores historical metrics at a one minute granularity. Vector is for per-instance custom drilldowns. I gave a talk last year where I showed how they both fit together: http://www.brendangregg.com/blog/2014-09-27/from-clouds-to-roots.html http://www.brendangregg.com/blog/2014-09-27/from-clouds-to-r...
- davidu 11y agoGot it... and thank you Brendan!
- fche 11y agopcp is happy to collect & persist metrics; vector just doesn't happen to render them. pcp offers other ways to interact with live or archive-saved data, including other webapps.
- cpwatson 11y agodoesn't htop require you to go onto the box? We haven't released our custom pcp modules yet which allow more complex visualizations such as flamegraph generation from perf event sampling.
- lscotte 11y agoYes, exactly - htop is a curses application that shows instantaneous samples of a few system metrics, but it mostly lists processes - this is nothing like Vector at all...
- brendangregg 11y agoNot really. htop doesn't visualize historical trends from numerous sources at the same time. Vector also allows us to interface with other metric sources, beyond /proc.