Calculate the size needed for your extended datastore


Before you begin

Familiarize yourself with ExtraHop datastore concepts.
  1. Log into the Web UI of your Discover appliance.
  3. Scroll down to the Datastore section.
  4. In the Store Lookback chart, note the Rate and Estimated Lookback for each metric cycle (or time period) that you want to store on the external datastore. The rate for 5-minute metrics in our example figure below is 27.85 KB/s.
    1. Convert the rate from seconds to days: 27.85 * 60 (seconds) * 60 (minutes) * 24 (hours) * 30 (days) = 72187200 KB for 30 days of lookback.
    2. Convert the rate from kilobytes to megabytes: 72187200 / 1024 = 70495 MB for 30 days of lookback.
    3. Convert the rate from megabytes to gigabytes:70495 / 1024 = 68 GB for 30 days of lookback.
    To store all of the 5 minute metrics from this appliance for 30 days, you need 68 GB of free space.
Published 2021-04-07 20:06