Questions about columnstore

Off-Topic
1

Hello

Writing Columnstore DataUnlike other columnstore implementations, MemSQL supports very fast, small-batch writes (such as single row inserts) directly into columnstore tables. This is implemented by storing newly written rows in a row-oriented skiplist before flushing them to the column-oriented format. This is all handled automatically behind the scenes, and rows are visible to reads as soon as they are committed to the row-oriented skiplist.(Columnstore · SingleStore Documentation)

According to the above,
Is data stored in memory before it is flushed back up to snapshots and logs?

Thanks.

2

Data is persisted to transaction logs on disk in both cases. The internal row vs column formats for data stored in the columnstore table has no effect with respect to durability.