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Flow Volume
opflow_stats.pl calculates how many flows per second are being received by the server. To view this info just run it
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Average flows per cycle is how many flows are received in a 2 minute cycle. In this case it's saying 34, you may immediately think "this makes no sense" and you are correct. The system this info was taken from had been saving up flows (opflowd was not running) and then it inserted them all at once followed by very few flows being received after. This is a good representation of inconsistent flow records making the numbers look incorrect.
Import Performance
In addition to saving the flows to disk, opFlow also needs to parse and import the flows into the database. To get an idea of how many flows per second (fps) opflowd is importing into mongo run this command:
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'opflow_keep_raw_flows' => 'true',