Re: [MirageOS-devel] Monitoring MirageOS guests on CubieBoard2

[Thomas Gazagnaire <thomas@xxxxxxxxxxxxxx>]

> The medium-term goal is to sample the RRD stats into the Irmin git backend 
> (https://github.com/mirage/irmin) that Thomas Gazagnaire is working on.  This 
> will let applications have a non-blocking stats delivery model via RRD, and 
> still provide a persistent data structure for long-term accrual of data (e.g. 
> via Git pushing to an aggregation server that isn't a tiny embedded device).

I think we should be careful here. The main goal of RRD stats is to report 
long-running -- and possibly very intensive -- program stats with a bounded 
amount of memory. If you store the RRDs in irmin, you'll loose that property: 
your history will grow forever, possibly quite fast. I get you'll loose some 
performance as well as persistent arrays are less far efficient than the usual 
mutable arrays.

So yes, that's possible to store RRDs stats in irmin, but I'm not sure that 
what we really want usually in this scenario.

Thomas


> I did ponder exposing this via SNMP, and then ran away screaming when I 
> looked at the protocol description after some time away for it.  Let's put 
> that down as a 'future feature' :-)
> 
>> This really is a tremendous environment for small board solutions. Thanks to 
>> everyone for make this available.
>> 
>> I'm definitely not worthy.
> 
> You most definitely are!  Very much looking forward to seeing what uses you 
> put it to.
> 
> cheers,
> Anil
> 
> 
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