You’ll be billed for ~194.63mbps as that is the larger of the two, if that is the port facing your supplier that they bill you for.
The 95th does not “convert” into a usage figure, because it is not the mean usage figure you would use to estimate bytes
transferred.
Forget thinking in terms of bytes per month (I don’t know why you’re asking about bytes per month, really?), because it’s a relatively
meaningless metric if your datacentre is billing you in mbps 95th percentile unless you are considering changing to a supplier that will bill you in bytes per month. It is entirely possible to generate a
You can see on that graph that while the outbound 95th was 194mbps your actual outbound data transferred over that period
was only ~43.17, whereas if you had used 194.63mbps *consistently* over the month (eg: your average was then also 194.63mbps), your transferred bytes would be in the region of 58TB.
Assuming your port was fast enough, you could blow through your 60TB in 36 hours (and do NOTHING for the rest of the month) and you’d
a bill for ~3700mbps of usage on 95th percentile. This is why bytes transferred per month is not a useful metric when you’re trying to figure out 95th percentiles. Bytes per month can only be converted to an average of bits per second,
not to the 95th. I don’t know if I can explain this any other way.
The data in the RRD will not be of billing-accuracy and you will likely see a discrepancy between your 95th and the provider’s
95th. You need a pro subscription and a traffic accounting bill to get the correct granularity for accurate 95th calculation.
From: observium [mailto:observium-bounces@observium.org]
On Behalf Of Talk Jesus
Sent: 22 July 2015 19:19
To: 'Observium Network Observation System'
Subject: Re: [Observium] Question about traffic graphs
Yes, but only when viewing specific ports, not the router itself.
I just checked for the specific port to the uplink, my mistake.
I just ran for the full month of June. Please see attached.
They told me the following
“bandwidth utilization data captured both inbound and outbound usage. They are both used in calculating 95% values, but they are not added together
or combined.
If the customer’s 95% is 90Mbps for inbound, and 26Mbps for outbound, they are only billed using the 90Mbps value. (not 90+26)”
So based on the graph, I would have been billed for the 176MBps (converted as 52.8TB). Correct? Just making sure I’m understanding the calculations.
And according to what you’re saying, it polls every 5 minutes which is what the data center does too. So my graph should be generally very accurate.
From: observium [mailto:observium-bounces@observium.org]
On Behalf Of Phillip Baker
Sent: Wednesday, July 22, 2015 2:08 PM
To: Observium Network Observation System <observium@observium.org>
Subject: Re: [Observium] Question about traffic graphs
I don’t understand. Don’t you have a legend that looks like the attached on every graph?
You can see the 95th figures there.
Observium is designed on 5 minute like everyone else, pretty much. You can probably change it but you really don’t need to (and it isn’t as easy as changing the
cron job frequency)
What they mean is that they charge you for bandwidth on 95th percentile, not bytes transferred per month (overall “usage”).
From: observium [mailto:observium-bounces@observium.org]
On Behalf Of Talk Jesus
Sent: 22 July 2015 19:01
To: 'Observium Network Observation System'
Subject: Re: [Observium] Question about traffic graphs
Hi,
I’m using CE.
Basically what I did was run the traffic graph for my main router to the facility’s upstream (uplink basically). I did the entire month of June to
the exact second.
I just did a quick “last month” output
Total
In 60TB
Out 60TB
Agg 120
How would I convert this to Mbps in 95th? Sorry, still learning this calculation.
How often does the CE version poll data anyway and can it be changed?
Phillp Baker stated that it shows Mbps as “M”, so if I figured this out right, the above AS IS is 200MBps. But, is Observium CE stating this in 95th
or do I have to figure this out manually what 95th it will be?
Please note what I quoted before “They also state they bill me on bandwidth utilization, not data used.” Anyone know what they might mean by this?
I haven’t asked them yet, been going back and forth but slow responses.
From: observium [mailto:observium-bounces@observium.org]
On Behalf Of Adam Armstrong
Sent: Wednesday, July 22, 2015 1:43 PM
To: observium@observium.org
Subject: Re: [Observium] Question about traffic graphs
Are you using CE or Pro?
With Pro the best thing would be to create a bill which matches the ports that your provider is billing, that way you'll be basically collecting the same data that
your provider is.
With CE, you can look at the '95th' line on traffic graphs. The red line is approximated 95th, but it's not accurate since we don't store 5-minute data for a full
month.
adam.
On 22/07/2015 18:19:45, Talk Jesus <chad@talkjesus.com> wrote:
Hi,
My data center bills me based on 95th percentile and Mbps, but Observium shows traffic as bits/second.
My monthly allowance is 100Mbps, how would I convert that to the bits/second in 95th? They also state they bill me on bandwidth utilization, not data used.
Finally, they state they use 5 minute intervals for data collection, I guess that’s also called ‘polling’ if I’m not mistaken? I could not find any info on how often the data is collected.
Just to clarify, if I got the calculation right – 100Mbps = 30TB /mo (rounded off).