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Jeremiah Jordan commented on CASSANDRA-18796:
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I still think something like warn at 32? 50? and never fail is the right
default. And maybe allow someone to set fail to zero to prevent all non
partition restricted queries.
> Optionally fail when a non-partition-restricted query is issued against a
> storage-attached index with a backing table using LCS
> -------------------------------------------------------------------------------------------------------------------------------
>
> Key: CASSANDRA-18796
> URL: https://issues.apache.org/jira/browse/CASSANDRA-18796
> Project: Cassandra
> Issue Type: Improvement
> Components: Feature/2i Index, Feature/SAI, Local/Compaction/LCS
> Reporter: Caleb Rackliffe
> Assignee: Caleb Rackliffe
> Priority: Normal
> Fix For: 5.0.x, 5.x
>
>
> With LCS, we will have potentially thousands of SSTables for a given user
> table. Storage-attached also means SSTable-attached, and searching thousands
> of attached indexes is not going to scale well at all locally, due to the
> sheer number of searches and amount of postings list merging involved. We
> should have a guardrail to prohibit this by default.
> Partition-restricted queries, the use-case SAI is broadly designed for,
> should be very efficient.
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