https://wikitech.wikimedia.org/wiki/Help:Tool_Labs/Database/Replica_drift
(WARNING) 2017-10-17: Replica drift was a recurring problem for the Wiki Replicas prior to the introduction of row-based replication (RBR) between the sanitarium server(s) and their upstream sources. The RBR replication used to populate the `*.{analytics,web}.db.svc.eqiad.wmflabs` servers will not allow arbitrary differences in data to be synchronized. If there is a replication failure it will halt all replication with the master server which will in turn raise an alert that will be noticed and corrected.
(WARNING)
https://phabricator.wikimedia.org/phame/post/view/70/new_wiki_replica_servers_ready_for_use/
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**Please report database drift/inconsistencies as a comment on this task.**
Please mention:
* the SQL query, preferably in a format that is easy to compare between production and labs (count(*), md5sum, ...)
* the actual result
* the expected result (e.g. based on the live wiki, or a rough indication of why the query is wrong)
Related tasks:
{T74413}
{T106470}
{T115207}
{T115517}
{T118095}
{T126946}
{T129432}
{T133469}
{T133715}
{T134203}
{T136618}
{T138927}
{T153058}
NOTE: September 25, 2017:
https://phabricator.wikimedia.org/phame/post/view/70/new_wiki_replica_servers_ready_for_use/