There is an API for this in Tigase: StatisticsArchivizerIfc. There are a few plugins implementing this already, but they are storing metrics in DB. A new plugin could just dump everything to a filesystem. Should be off by default or if On by default it should dump stats not more often than once an hour.

Created new CounterDataFileLogger utilizing @StatisticsArchivizerIfc@. It's off by default, configuration follows convention used by Statistics Archivizers. A new documentation entry regarding Statistics Archivizers in general was created: [--stats-archiv](http://www.tigase.org/content/stats-archiv)