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How to keep a cumulative value of a field that occasionally resets to 0 in the source

New Member

I have a cumulative counter in a .csv log, the issue is, the software generating the .csv resets this counter from time to time.

The file looks like this, the counter is the second value.
1005 ,4400.00,
1005 ,4450.00,
1005 ,0.00,
1005 ,0.01,
1005 ,30.00,

What I look for is away to obtain the value of the counter disregarding resets, so in the example that would be 4480.01

I guess this can be done by summing the delta from last to previous value, however I have no Idea how to tell Splunk to ignore the delta when the last value is 0, and resume counting with the last high/non-zero value.

Thanks for the help, L

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