2086 probes migrated 😅 Great work! On Wed, Jul 9, 2025 at 7:18 PM Florian Quèze <[email protected]> wrote:
> tl;dr: All data collection in Firefox Desktop now happens using Glean. > Legacy telemetry recording APIs have been removed. > > With over 419 patches landed, 593 reviews from 75 unique reviewers (thank > you!), 1242 files changed and 2086 probes migrated or removed since we > decided to accelerate the migration [1], the effort to migrate data > collection in Firefox Desktop from legacy Telemetry to Glean is now > completed: arewegleanyet.com reached 100% today! > > To avoid causing immediate disruption in existing queries, the data for > migrated probes is being sent to both Glean and legacy telemetry through > automatic mirroring. We expect this mirroring to last about a year, to > allow year-over-year queries and give people time to update their queries. > > Legacy telemetry recording APIs have been removed to ensure no new > legacy-Telemetry only data collection is introduced, but legacy telemetry > testing APIs are still in use. Some existing probes had test coverage and > the tests still pass, checking the data recorded through mirroring. > No immediate action is required, but it would be a good idea to start > modifying tests using legacy telemetry APIs to instead check the data > recorded in Glean[2]. > > Once the mirroring period is over (exact date TBD), legacy telemetry will > stop sending data, and the remaining legacy telemetry code will be dead > code to clean-up. If you already know you don’t need to have your data in > both legacy telemetry and Glean, to reduce costs please remove the legacy > telemetry mirrors for glean metrics in your code by removing the > telemetry_mirror property from the Glean metrics, and removing the named > definitions from Histograms.json, Scalars.yaml, or Events.yaml. > > Need help? Ask in https://chat.mozilla.org/#/room/#telemetry:mozilla.org > > [1] > https://docs.google.com/document/d/14xYKOOi-8dHKcCP1awcT4_LxxyNFTB6Tkv18zQUGhn4/edit > [2]: > https://firefox-source-docs.mozilla.org/toolkit/components/glean/user/instrumentation_tests.html > > -- > Florian Quèze > > -- > You received this message because you are subscribed to the Google Groups " > [email protected]" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion visit > https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CAFu36SrQ-baorS9y%2Bj0sFpAFh%3DsYoEQ3%2BioNF5eX%2BKfsprZWyQ%40mail.gmail.com > <https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CAFu36SrQ-baorS9y%2Bj0sFpAFh%3DsYoEQ3%2BioNF5eX%2BKfsprZWyQ%40mail.gmail.com?utm_medium=email&utm_source=footer> > . > -- You received this message because you are subscribed to the Google Groups "[email protected]" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion visit https://groups.google.com/a/mozilla.org/d/msgid/dev-platform/CANOk3x%3DVnYB3ve8Hwp7Z1xJebyhR-Hu%2B2dPXSiQWKkkx0iXQRw%40mail.gmail.com.
