Michael Semb Wever created CASSANDRA-21517:
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Summary: Guardrail values of zero to mean literally zero (i.e.
disabled)
Key: CASSANDRA-21517
URL: https://issues.apache.org/jira/browse/CASSANDRA-21517
Project: Apache Cassandra
Issue Type: Improvement
Components: Feature/Guardrails
Reporter: Michael Semb Wever
Assignee: Michael Semb Wever
Guardrail values of -1 and 0 both mean unlimited.
https://github.com/apache/cassandra/blob/cassandra-6.0/src/java/org/apache/cassandra/db/guardrails/MaxThreshold.java#L60
This comes from CASSANDRA-17212 and appears to have been an oversight.
This creates difficulties when you need finer control of the guardrails, like
not being able to configure "more than 0 is a warning" or "more than 0 is a
failure".
For example, a typically recommended approach to secondary indexes would be as
{code}
# disable secondary_indexes
secondary_indexes_total_fail_threshold = 0
# disable sasi
sasi_indexes_total_fail_threshold: 0
# unlimited sai, but max ten per table
sai_indexes_per_table_fail_threshold: 10
sai_indexes_total_fail_threshold: -1
{code}
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