Comment Re:Twitter needs scalability experts (Score 2, Informative) 157
You're right, I failed to mention disaster recovery– it was something we looked at, its just been awhile since we went through the evaluation process, so I've forgotten a few things.
We actually liked Cassandra for DR scenarios – the snapshot functionality makes backups relatively straight forward, plus multi-DC support will make operational continuity in the case of losing a whole DC a possibility.