Migrate the mathoid use-case from legacy storage (Cassandra 2.x), to the new strategy and cluster (Cassandra 3.x).
Normally, we would need to copy over all of the data in order to minimise user impact. However, we are preparing a new release of Mathoid (cf. T172767) which will need a complete round of re-renders, so we can couple these two transitions. The following steps are needed:
extract all of the formulae from Cassandra 2 deploy Mathoid to codfw set-up a switched version of RESTBase in codfw (but without purging) execute check and render requests for each formula
- (optional) copy over the indirection table
fully deploy Mathoid and RESTBase
- issue purge requests for all formulae covered in the process