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https://issues.apache.org/jira/browse/CASSANDRA-17151?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17554529#comment-17554529
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Andres de la Peña commented on CASSANDRA-17151:
-----------------------------------------------
The proposed patch adds a new guardrail called {{column_value_size}}:
{code}
column_value_size_warn_threshold:
column_value_size_fail_threshold:
{code}
||PR||CI||
|[trunk|https://github.com/apache/cassandra/pull/1684]|[j8|https://app.circleci.com/pipelines/github/adelapena/cassandra/1702/workflows/1a1f7823-8455-4011-9209-fcd714390327]
[j11|https://app.circleci.com/pipelines/github/adelapena/cassandra/1702/workflows/b7be7248-fbc4-4331-a51f-71180ad2b688]|
This guardrail is different to the current {{max_value_size}} limit.
{{max_value_size}} was added by CASSANDRA-9530 as a check when deserializing
any value to detect sstable corruption. It has a default value of 256MB.
Differently, the proposed guardrail is checked on the CQL layer to reject
regular user queries trying to insert too large columns, before we even perform
any write. It probably will have a value of a few MB when used.
The guardrail is only applied to the values of regular columns because both the
serialized partitions keys and the values of the components of the clustering
key already have a fixed, relatively small size limit of 65535 bytes. This size
limit will be probably lesser than any useful guardrail value, so we can
probably save us checking the guardrail for the primary key columns.
> Guardrail for column size
> -------------------------
>
> Key: CASSANDRA-17151
> URL: https://issues.apache.org/jira/browse/CASSANDRA-17151
> Project: Cassandra
> Issue Type: New Feature
> Components: Feature/Guardrails
> Reporter: Andres de la Peña
> Assignee: Andres de la Peña
> Priority: Normal
>
> Add a guardrail for limiting the max size of column values, for example:
> {code}
> # Failure threshold to prevent writing large column values.
> # Defaults to -1 to disable.
> column_value_size_failure_threshold_in_kb: -1
> {code}
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