[CASSANDRA-10045] Sparse/Dense decision should be made per-row, not per-file

• Type: Sub-task
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 3.0 beta 2
• Assignee: Benedict Elliott Smith
• Reporter: Benedict Elliott Smith

Authors

Benedict Elliott Smith

Reviewers

Sylvain Lebresne

• Created: 11/Aug/15 17:33
• Updated: 16/Apr/19 09:31
• Resolved: 28/Aug/15 08:04

Description

Marking this as beta 1 in the hope I have time to rustle it up and get it reviewed beforehand. If I do not, I will let it slide, but our behaviour right now is not brilliant for workloads with a variance in density, and it should not be challenging to make a more targeted decision.

We can also make use of CASSANDRA-9894 to make column encoding more efficient in many, even dense, cases.