dan jatnieks created CASSANDRA-18617:
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Summary: Disable the deprecated keyspace/table thresholds and
convert them to Guardrails
Key: CASSANDRA-18617
URL: https://issues.apache.org/jira/browse/CASSANDRA-18617
Project: Cassandra
Issue Type: Improvement
Reporter: dan jatnieks
Assignee: dan jatnieks
The non-guardrail thresholds 'keyspace_count_warn_threshold' and
'table_count_warn_threshold' configuration settings were first added with
CASSANDRA-16309 in 4.0-beta4 and have subsequently been deprecated since
4.1-alpha in CASSANDRA-17195 when they were replaced/migrated to guardrails as
part of CEP-3 (Guardrails).
These thresholds should now be removed from cassandra.yaml, while still allowed
in existing yaml files.
The old thresholds will be disabled by removing their default values from
Config.java, and any existing values for these thresholds will be converted to
the new guardrails using the '@Replaces' tag on the corresponding guardrail
values.
Since the old thresholds considered the number of system keyspace/tables in
their values, the '@Replaces' conversion will subtract the current number of
system tables from the old value and log a descriptive message.
See dev list discussion:
https://lists.apache.org/thread/0zjg08hrd6xv7lhvo96frz456b2rvr8b
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