Typical event rate · category

Application log rate: 100 events/s per device

An application source typically produces 100 events per second per device, bursting to 1,000: web access logs high, service audit trails low. The rate is an informed estimate, a starting point for a sizing, not a measurement; the event sizes below are measured.

Measured sources in this category

Average bytes per event, measured, and one device's volume at the typical 100 events per second.

At the median size, a day from one device, 3.5 GB, is about the size of an hour of Netflix in HD.

Size a fleet

Raw bytes, before compression, indexing overhead and replication.

Measure a sample of your own

The figure above is an average; yours will differ, and for application logs what moves it most is this: web access logs high, service audit trails low. The profiler reads a sample from application logs in your browser, line by line, one event per line, and reports the bytes per line to set against it. Nothing is uploaded.