Mailinglist Archive: opensuse (3964 mails)
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Re: [SLE] OT: Calculating 95th Percentile
- From: Neil White <whiteyn@xxxxxxxxx>
- Date: Mon, 1 Nov 2004 17:20:48 +0000
- Message-id: <c5da7d6f0411010920d665644@xxxxxxxxxxxxxx>
<snip>
> > Our bandwidth is provided through a Summit48 switch / router. We get
> > given 1MB/s bursting to 2MB/s.
> >
> > Is this achieved by configuring our port on the switch/router to have
> > a max speed of 2MB/s ? then querying the switch/router every 5 minutes
> > for the current throughput ?
>
> Perhaps I'm looking at this in an overly simplistic light, but don't
> you just take the customer's bandwidth usage at samples of n minutes,
> and then bill them for the usage point at which 95% of their usage is
> below? In other words, make a chart, find the mean and standard
> deviation, and add 2 standard deviations to the mean usage. That'll
> get you the point at which 5% of the n-minute average samples are
> above and 95% of the n-minute samples are below.
Yes, this is correct. However, the thing I am interested in, is HOW
is this actually done ? I.e, is the reading taken via SNMP off the
router / switch ? Is this even possible. I dont know what can and
cant be done with the high end routers / switch.
Also, would the providor set the router / switch to allow up to 2MB/s
? or if not, what is restricting me to up to 2MB/s ?
> > Our bandwidth is provided through a Summit48 switch / router. We get
> > given 1MB/s bursting to 2MB/s.
> >
> > Is this achieved by configuring our port on the switch/router to have
> > a max speed of 2MB/s ? then querying the switch/router every 5 minutes
> > for the current throughput ?
>
> Perhaps I'm looking at this in an overly simplistic light, but don't
> you just take the customer's bandwidth usage at samples of n minutes,
> and then bill them for the usage point at which 95% of their usage is
> below? In other words, make a chart, find the mean and standard
> deviation, and add 2 standard deviations to the mean usage. That'll
> get you the point at which 5% of the n-minute average samples are
> above and 95% of the n-minute samples are below.
Yes, this is correct. However, the thing I am interested in, is HOW
is this actually done ? I.e, is the reading taken via SNMP off the
router / switch ? Is this even possible. I dont know what can and
cant be done with the high end routers / switch.
Also, would the providor set the router / switch to allow up to 2MB/s
? or if not, what is restricting me to up to 2MB/s ?
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