[CASSANDRA-13703] Using min_compress_ratio <= 1 causes corruption

• Type: Bug
• Status: Resolved
• Priority: Urgent
• Resolution: Fixed
• Fix Version/s: 4.0-alpha1, 4.0
• Severity: Critical
• Assignee: Branimir Lambov
• Reporter: Branimir Lambov

Authors

Branimir Lambov

Reviewers

Dimitar Dimitrov

• Created: 20/Jul/17 15:21
• Updated: 15/May/20 08:06
• Resolved: 15/Sep/17 08:38

Description

This is because chunks written uncompressed end up below the compressed size threshold. Demonstrated by applying the attached patch meant to improve the testing of the 10520 changes, and running CompressedSequentialWriterTest.testLZ4Writer.

The default min_compress_ratio: 0 is not affected as it never writes uncompressed.

Issue Links

• Blocked: CASSANDRA-10520 Compressed writer and reader should support non-compressed data.