1884407 - Add a probe to measure available disk space for profile directory storage device

Status: RESOLVED FIXED

(Firefox :: Profile Backup, task, P1)

Description

[Mike Conley (:mconley) (:⚙️)]

We'd like to get a reading on how much disk space users tend to have on the storage device that hosts their user profile, as this is the place where we'll be placing the "staging" directory, and the most recent backup. This is not necessarily the same storage device that the single file archive will be written to by default.

Comment 1

[Mike Conley (:mconley) (:⚙️)]

Attachment: Bug 1884407 - Add a probe to measure free disk space on the profile directory storage device. data-review=jhirsch r?fchasen!,kpatenio!

Comment 2

[Mike Conley (:mconley) (:⚙️)]

Attachment: Data collection request

Comment 3

[Jared Hirsch [:jhirsch] (he/him) (Needinfo please)]

Comment on attachment 9390266 [details]
Data collection request

data-review+.

One point to consider--reporting KB available seems awfully precise, and we might consider instead a fuzzier measure, like rounding the available storage down to the nearest 10 MB, to avoid any risk of fingerprinting a device based on a narrow range of available space.

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1. Is there or will there be documentation that describes the schema for the ultimate data set in a public, complete, and accurate way?

Yes.

2. Is there a control mechanism that allows the user to turn the data collection on and off?

Yes, the usual opt out in desktop Firefox.

3. If the request is for permanent data collection, is there someone who will monitor the data over time?

Yes, mconley will monitor.

4. Using the category system of data types on the Mozilla wiki, what collection type of data do the requested measurements fall under?

Category 1, technical data.

5. Is the data collection request for default-on or default-off?

Default on.

6. Does the instrumentation include the addition of any new identifiers (whether anonymous or otherwise; e.g., username, random IDs, etc. See the appendix for more details)?

No.

7. Is the data collection covered by the existing Firefox privacy notice?

Yes.

8. Does the data collection use a third-party collection tool?

No.

Comment 4

[Mike Conley (:mconley) (:⚙️)]

One point to consider--reporting KB available seems awfully precise, and we might consider instead a fuzzier measure, like rounding the available storage down to the nearest 10 MB, to avoid any risk of fingerprinting a device based on a narrow range of available space.

That's a good idea. I'll do that before landing. Thanks!

Comment 5

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/fddbc2279422
Add a probe to measure free disk space on the profile directory storage device. data-review=jhirsch r=fchasen,kpatenio

Comment 6

[Norisz Fay [:noriszfay]]

Backed out for causing python failures on test_yaml_indices.py

Backout link

Push with failures

Failure log

Comment 7

[Pulsebot]

Pushed by [e-mail]:
https://hg.mozilla.org/integration/autoland/rev/277f9edee55c
Add a probe to measure free disk space on the profile directory storage device. data-review=jhirsch r=fchasen,kpatenio,backup-reviewers

Comment 8

[Natalia Csoregi [:nataliaCs]]

https://hg.mozilla.org/mozilla-central/rev/277f9edee55c