Remove download count retention period from README

In order to view the impact of changes such as OS releases over a longer
period of time, we have removed the automatic expiry of the anonymous
download counts from the rpi-imager stats service.

For reference, the download counts contain only the following data:

    > ZREVRANGE image:2021-03-12 0 1 WITHSCORES
    1) Raspberry Pi OS (32-bit)
    2) 1234
    3) Raspberry Pi OS Lite (32-bit)
    4) 567

Update the README section about telemetry in order to reflect the
change.
This commit is contained in:
Paul Mucur 2021-03-12 11:13:03 +00:00
parent 832be86e79
commit ca5180429e
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@ -148,7 +148,7 @@ In order to understand which images and operating systems are most popular and r
This web service is hosted by [Heroku](https://www.heroku.com) and only stores an incrementing counter using a [Redis Sorted Set](https://redis.io/topics/data-types#sorted-sets) for each URL, operating system name and category per day in the `eu-west-1` region and does not associate any personal data with those counts. This allows us to query the number of downloads over time and nothing else.
The download counts are retained for 90 days and the last 1,500 requests to the service are logged for one week before expiring as this is the [minimum log retention period for Heroku](https://devcenter.heroku.com/articles/logging#log-history-limits).
The last 1,500 requests to the service are logged for one week before expiring as this is the [minimum log retention period for Heroku](https://devcenter.heroku.com/articles/logging#log-history-limits).
On Windows, you can opt out of telemetry by disabling it in the Registry: