On 2019-02-21 20:10:24, Michael via observium <observium@observium.org> wrote:

There is a number of ways to join the stats from two rrds together into a single new rrd.

Search for "rrdtool merge".

I've done this a number of times during different device migrations/upgrades in order to preserve long term trend data. But i can't recall the exact commands of the top of my head and I'm AFK.

Hope this helps,

Michael



On February 22, 2019 6:28:17 AM GMT+11:00, Adam Armstrong via observium wrote:
>Port statistics are just held in a .rrd file on the server. You can
>copy one file over another file. This is usually not a good thing to
>do, because you're copying statistics for errors and other things too,
>but if it's legitimately the same interface, this isn't a problem.
>
>You can see what the files are by clicking on a graph and seeing what
>RRDs are used (or showing the RRD command for graphs where the RRDs
>aren't shown in the UI)
>
>adam.
>On 2019-02-21 15:07:58, Adam Thompson via observium
> wrote:
>I made a change on one of our routers that caused a new ifIndex & name
>to be assigned to a customer circuit (interface).
>Observium is correctly reporting the data on the old virtual i/f (which
>still technically exists) and – naturally – separately on the new
>virtual i/f.
>Is there any way to (retroactively???) tell Observium that these are
>really the same interface, and to display only one graph for the two
>ifIndexes?
> 
>Or, if I correct the situation so the old ifIndex & name is being
>showing traffic again, is there any way to move, or inject, the
>collected data on the ‘new’ port into the ‘old’ port’s RRDs?  (i.e.
>avoid a multi-day gap in a multi-year dataset)
> 
>We are reasonably up-to-date, running 19.2.9712 – not sure what other
>info will be helpful here.
> 
>Thanks,
>-Adam
> 
>Adam Thompson
>Consultant, Infrastructure Services
>[merlin-email-logo]
>100 - 135 Innovation Drive
>Winnipeg, MB, R3T 6A8
>(204) 977-6824 or 1-800-430-6404 (MB only)
>athompson@merlin.mb.ca [mailto:athompson@merlin.mb.ca]
>www.merlin.mb.ca [http://www.merlin.mb.ca/]
> 
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