making CouchDB as yet another MRTG.

I prototyped a CouchApp example for resource monitoring system in this weekend. My prototype is available on my server.

http://www.yssk22.info/stats/_design/site/_show/history


I summarized pros & cons for using CouchDB as resource monitoring system. If you are insterested in, ping me on twitter.com/yssk22 so that I'll publish on my github.

Pros:

• easy to define metrics because CouchDB is schema-less database.
• easy to calculate metrics using CouchDB views.
• easy to notify alerts by using _change & _filter endpoints (not implemented yet).
• easy to render charts using jQuery (and jqplot plugin).
• using the replication feature, monitoring repository clusters could be implemented, which could be more scalable than existent
• no mysql and php required (it's important for me)

Cons:

• CouchDB has no scheduling system (though Lotus Notes has) so that deployment of monitoring agents is not so easy yet.
• There are many matured tools as MRTG, Nagious, Caccti, Zabbix, ... and so on.

To be done:

• Cumulative resources such as /proc/stat should be calculated diffs using list functions.
• Real-time chart rendering using CouchApp's Evently plugin.