Long-Running Test to Gather Statistics Throughout a Whole Day

This would be an interesting feature to have available:

Basically, I've ran iperf and also ethr between a pair of servers (one in the cloud and one in our local environment) on a number of occasions because I'd like to get a sense of the overall bandwidth available for the private connection between the two points.

In my earlier iperf tests (the first was a few months back and a more recent one a few weeks back) the connection speed was maybe around 100 Mbps (over what should be gigabit connections on both ends, although the encryption for the private connection is going to reduce that thoroughput overall).

In my test a few moments ago with Ethr, the speeds were more like 350 Mbps and so I'm wondering a few things now (were the iperf results incorrect, is ethr incorrect, or is there a potential speedup explained by an update in the VPN client, or is it timing related, since I'm running this test earlier in the morning?).

It would be nice to leave Ethr running for day (with both the client and server being available, but maybe only running the test once every X minutes) and then have those results compiled together at the end in some way. (Maybe as #74 suggests, or having some additional options such as the full results saved to CSV for further analysis later, or summarized by hour).

Not sure how difficult this would be to implement but it might be a useful bit of functionality for others as well that may have a similar need (I'm open to recommendations for other open-source tools as well that might be able to provide that info as well if Ethr is not a good fit).

No files or tests are identified in the issue. Start by reviewing Ethr's client and server test-running entry points and the related discussion in #74; done should define periodic measurements over a day and produce compiled results, such as CSV output or hourly summaries.