[rrd-users] Replace nan with previous value

Steve Shipway s.shipway at auckland.ac.nz
Tue Feb 22 22:27:51 CET 2011

> I want to know how with a CDEF or in a configuration directly
> stored in RRD files how can I replace nan value by the last real value.


IE, if the value of 'ds' is unknown, then use its previous value, else use its original value.

This is the function done by MRTG in native mode, or with Routers2 and the 'unknasprev' option.


Steve Shipway
ITS Unix Services Design Lead
University of Auckland, New Zealand
Floor 1, 58 Symonds Street, Auckland
Phone: +64 (0)9 3737599 ext 86487
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Email: s.shipway at auckland.ac.nz
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