[CASSANDRA-10225] Make compression ratio much more accurate

• Type: Improvement
• Status: Resolved
• Priority: Normal
• Resolution: Fixed
• Fix Version/s: 3.2
• Component/s: Legacy/Tools
• Labels: lhf
• Assignee: Brett Snyder
• Reporter: Jeremy Hanna

Authors

Brett Snyder

Reviewers

Benjamin Lerer

• Created: 28/Aug/15 21:50
• Updated: 16/Apr/19 09:30
• Resolved: 26/Nov/15 14:11

Description

Currently in cfstats, it will take an average over the compression ratios of all of the sstables without regard to the data sizes. This can lead to a very inaccurate value. It would be good to factor in the uncompressed and compressed sizes for the sstables to give an accurate number.

Issue Links

• is duplicated by: CASSANDRA-10763 jmxmetrics_test.TestJMXMetrics.begin_test is failing
• relates to: CASSANDRA-10775 SSTable compression ratio is not serialized properly