I currently have a massive MySQL Data but would like to move over to Cassandra nosql. How hard of a move over would this be? I've not found any examples yet on this being done. It is possible right.
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A perfect answer to this question would represent a few months worth of work for a consultant. The simple fact that you ask the question means you need to have someone on board with you to execute any kind of migration.
This modification would impact code (interfaces to DB are differents), software (Cassandra node setup isn't the same as a MySQL Cluster, or MySQL replicated setup), hardware (technical requirement and proposed setup aren't exactly the same), maintenance (the 2 software have very different upgrade path), and even deployment procedure...
A standard path for migration would be :