naseryyash opened a new pull request, #4885:
URL: https://github.com/apache/cassandra/pull/4885
CASSANDRA-18216: Allow sharding of the SAI in-memory index
- Refactor MemtableIndex from concrete class to interface
- Add UnshardedMemtableIndex preserving existing behavior
- Add ShardedMemtableIndex with token-range sharded TrieMemoryIndex[]
- Extend ShardBoundaries with precomputed partition ranges and
shard-to-key-range intersection
- Add Range.intersects() overloads for IncludingExcludingBounds and
ExcludingBounds
- Add MemtableIndexManager factory routing based on index options
- Sharding is opt-in via CREATE INDEX WITH OPTIONS = {'shards': '<count>'}
- Reject shards option on vector indexes at validation time
patch by Yash Nasery; reviewed by Caleb Rackliffe for
[CASSANDRA-18216](https://issues.apache.org/jira/browse/CASSANDRA-18216)
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