Re: SLA monitoring and reporting to customers

[virendra rode // <virendra.rode () gmail com>]

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william(at)elan.net wrote:
> On Sun, 18 Mar 2007, virendra rode // wrote:
>
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> > william(at)elan.net wrote:
> > > On Sun, 18 Mar 2007, Rubens Kuhl Jr. wrote:
> > >
> > > > What open-source or low-budget tools are operators using for SLA
> > > > monitoring when the reports (current state and historical) should be
> > > > available to customers ?
> > >
> > > Please define SLA in terms of monitoring.
> > - -----------------------
> > I would say,
> >
> > - - availability
>
> OK - network connection up or UP/DOWN with list of when its down
> and for how long and SLA based on amount of time its been down
> or more commonly time_up/time_down*100
>
> > - - response time / latency
>
> ok ping latency graph for user view with SLA based on maximum
> average latency over given time period
>
> > - - utilization
>
> How is that part of SLA? Or do you mean you gurantee that
> your own upstream network connection would not be overutilized?
- -----------------
When an object exceeds a specified threshold (e.g. cpu, interface,
temperature, routing table, etc) which could cause it to be unavailable
triggering an event.


> > - - accuracy and errors
>
> accuracy of what? what type of errors, packet drops?
- --------------
availability and reachability because we care about of uptime, correct?


> > - - five nines, six nines , take your pick and define your own holy
> > grail.
>
> $ echo "60*24*365*(1-0.99999)" | bc -l
> 5.25600
>
> You wish to tell me you guarantee network connection to customer to
> be down for no more then 5 minutes during the year? Yeh, right :)
> (but don't let me discourage any of you in trying to achieve it!)


regards,
/virendra



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