[rrd-developers] Backwards compatability from 1.4.3 to 1.2.30

Tobias Oetiker tobi at oetiker.ch
Thu Jun 24 15:42:37 CEST 2010

Hi Euphoria,

as fahr as rrdtool is concerned 1.4 is able to real all previous
formats ... My guess is that you are using different compilation
options for 1.2 and 1.4 when building the windows binaries. It
seems that in windows you can influence the data alignement by
using particular compile options of compilers ... I have not
researched this ...


Today Euphoria Audio wrote:

> Hello! I was testing the Win32 build of 1.4.3 and ran into a problem where it is unable to read an RRD I created in 1.2.30 in Windows. I'm following Alex's great tutorial and created the 1.2.30 version of the rrd without any problems. Then I try to open that file in 1.4.3 and it fails on open, expecting a length of 1032 instead of 1024, so it's missing 8 bytes. If I create a new rrd in 1.4.3 following the tutorial, it works fine, but the values are off and there's a bug I'm trying to find with the timestamps being set sometime in the future. Both versions of rrdtool show that both rrds are version 0003. Was there new header information or anything added to 1.4? Thanks!
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Tobi Oetiker, OETIKER+PARTNER AG, Aarweg 15 CH-4600 Olten, Switzerland
http://it.oetiker.ch tobi at oetiker.ch ++41 62 775 9902 / sb: -9900

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