Question #151677 on Graphite changed:
https://answers.launchpad.net/graphite/+question/151677
Status: Open => Answered
chrismd proposed the following answer:
The retention configuration determines how whisper files are allocated
when a metric is first created. With 10 second precision there will
basically be an assumed 10-second step between values on disk, so when a
datapoint is received, the "timeslot" it applies to is calculated based
on the step, thus if you sent a datapoint every 2 seconds you would
basically send 5 values for the same 10-second interval. The most
recently received datapoint will be applied last and that is the value
that will stick.
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