>>I think it do a overflow when the failure is smaller than the first one. 

Yes, It's possible if the vm restart or migrated (I see this behaviour with 
disk ios too)

an old bugzilla is open about this here

https://bugzilla.proxmox.com/show_bug.cgi?id=204


----- Mail original ----- 

De: "Johannes Ernst" <[email protected]> 
À: [email protected] 
Envoyé: Mercredi 12 Février 2014 13:06:17 
Objet: [pve-devel] Proxmox RRD Data incorrect? 

Hello, 

anyone have the same issue that the rrd collection not work probably? 
Sometimes it shows values for netin and netout traffic with more than few 
petabytes and creates values like that: "netout" : 1.0248191148006e+16 
The delta would be no correct calculated. I think it do a overflow when the 
failure is smaller than the first one. 

I think we should check the value which will be saved or send to a api call. If 
that something like petabytes it should be dropped and only delivery 0. It is 
better than send so big values which are not correct and can break some traffic 
accounting or something. 

-- 

Mit freundlichen Grüßen 

Johannes Ernst 

--- 

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