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https://issues.apache.org/jira/browse/CASSANDRA-17147?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17451396#comment-17451396
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Andres de la Peña commented on CASSANDRA-17147:
-----------------------------------------------
[Here|https://github.com/adelapena/cassandra/commit/e2cadadd628ff70970cda6b8ecb9e2f3f45a6123]
is a first, minimal version of nested config. Nesting is limited to
{{GuardrailOptions}} and {{cassandra.yaml}} and the rest is as flat as before.
[This other
commit|https://github.com/adelapena/cassandra/commit/bb24a63cce0f2c6576875b48d8f7854edcc8af49]
extends this a bit so the guardrail classes accept the nested objects,
although JMX is still flat for convenience. If it looks good I'll add it to the
PR.
> Guardrails prototype
> --------------------
>
> Key: CASSANDRA-17147
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17147
> Project: Cassandra
> Issue Type: New Feature
> Components: Feature/Guardrails
> Reporter: Andres de la Peña
> Assignee: Andres de la Peña
> Priority: Normal
> Fix For: 4.x
>
> Time Spent: 14h 50m
> Remaining Estimate: 0h
>
> The purpose of this ticket is creating an initial implementation of the
> guardrails framework, as well as adding a few simple guardrails using this
> framework.
> To keep things easy, this initial implementation would only support
> guardrails that are triggered on the coordinator, and they would be
> dynamically updatable only through JMX.
> Once we have this initial framework ready in a feature branch we can have
> multiple tickets addressing all the things that would have been left out of
> the scope of this ticket, such as:
> * Dynamic updates through virtual tables
> * Being able to notify about guardrails triggered on replicas
> * Using custom exceptions other than {{InvalidRequestException}}.
> * Porting existing limits to use the new guardrails framework
> * Adding new guardrails beyond the initial ones
> The reason for having this simpler prototype is that it will give us a common
> ground to parallelize work on the parts mentioned above.
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