I have noticed that, in the spark sql query physical plan, there are two types of aggregations. I wanna know the difference between "hashAggregation" and "tungstenAggregation". I have shown, two types of physical plan for reference. Thanks!
I would like to try running KeystoneJS without MongoDB.
There's a short blog post explaining how to do it at http://ifrederik.com/blog/2014/11/cms-without-db-running-keystonejs-without-mongodb/
Basically, it explains how to replace MondgoDB with…