fgiunchedi added a comment.
Audit completed, what I did is count the number of null data points in the year leading to the graphite2003 reimage (i.e. the first reimage, where the backfill would have first failed) from 2020/10/14 to 2021/10/11 (first column). And the number of nulls after the first reimage (from 2021/10/12 to 2021/10/20) in the second column. The files for which backfill failed would have a high number of nulls in the first column but low in the second (i.e. datapoints are being appended now, but haven't for the last year). The full list for metrics with more than 10 nulls in last year but less than 10 in the last week is at https://people.wikimedia.org/~filippo/nulls-T294355 (12MB file). I believe these were all the metrics affected by the failed backfill and for which we lost historical data. TASK DETAIL https://phabricator.wikimedia.org/T294355 EMAIL PREFERENCES https://phabricator.wikimedia.org/settings/panel/emailpreferences/ To: fgiunchedi Cc: Addshore, fgiunchedi, Aklapper, Lucas_Werkmeister_WMDE, Invadibot, maantietaja, Akuckartz, Nandana, Robin.guo, Lahi, Gq86, GoranSMilovanovic, QZanden, LawExplorer, _jensen, rosalieper, Scott_WUaS, Wikidata-bugs, aude, Mbch331
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