Is 16MB enough?

RouterOS General
1

I was wondering if 16MB onboard flash is enough for normal router functioning?

I generally use the usual set, dns, dhcp, routing, etc + CAPsMan and usage graphing.

Thanks

2

If you want to using firewall, 16 mb is not enough

Sent from my SM-A705FN using Tapatalk

3

What kind of configuration would eat out memory?

4

I’d say nothing from you list requires extra flash space, perhaps except graphing. But even graphing does not usually occupy too much of a disk space. So, if a particular router model satisfies you requirements otherwise, flash size should not really be an issue.

5

Thanks, that’s what I presumed.

Do you happen to know if graphing engine truncate old data it collects to reduce DB size? hour/day/week/month… - If I set graphing, will 16 mb suffice for years to come?

6

Graphing engine truncates and averages data:

  • 5-minute averages will be displayed for last day (288 data points)
  • 30-minute averages will be displayed for last week (336 data points)
  • 2-hour averages will be displayed for last month - assume that’s 31 days (372 data points)
  • daily averages will be displayed for last year (366 data points)

For any given graph there will be at most 1362 data points stored at any time. For a modest router with some 17 physical and logical interfaces and queues and (I’m assuming here) using 32-bit counters that means around 110kB storage used. If 64-bit counters were used, storage size would be twice as much.

Actually the range of all above mentioned graphs is wider than I described … so storage size for graphing might be 30% or so higher.

No historical data is stored, which means that graphing data storage won’t grow with time.

7

Thank you very much!
Altho this kind of programming practice seems logical, most log files written by programs are infinite.