Comment 1 for bug 1187833

I've checked how Nova works about this, and actually the last meters should have a metadata.state field set to 'soft-delete'. Could you confirm that François, based on your data?

Based on that, I think this is the same problem someone might have with metadata.state being set to 'suspended' when VM are suspended. It's not up to the collection event nor Nova to deal with that, but with the API to allow more advanced filtering and computing on duration based on range where the metadata.state value of this meter is set to 'active'.