Trend NetFlow data over time Caligare Flow Inspector saves detailed data for many hours, days, weeks or months.
The number of history tables depends on your disk space and incoming data flow. For example routers
with ten 100Mbs interfaces and a 20GB disk, the optimal values: for hourly tables is 48, for daily
tables 31, for weekly tables 4 and for monthly tables 3. All options are configurable.
Figure: Long-term bytes utilization on the backbone router. (click for enlarge)