[ https://issues.apache.org/jira/browse/CASSANDRA-19968?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Caleb Rackliffe updated CASSANDRA-19968: ---------------------------------------- Test and Documentation Plan: Mostly this involves making sure the testing we already have around distributed index queries remains stable, with SAI being the highest priority item. Status: Patch Available (was: In Progress) |[patch|https://github.com/apache/cassandra/pull/3591]|[^ci_summary.html]| > Partition-restricted index and queries that use strict replica filtering can > use SinglePartitionReadCommand > ----------------------------------------------------------------------------------------------------------- > > Key: CASSANDRA-19968 > URL: https://issues.apache.org/jira/browse/CASSANDRA-19968 > Project: Cassandra > Issue Type: Improvement > Components: Consistency/Coordination, Feature/2i Index, Feature/SAI > Reporter: Caleb Rackliffe > Assignee: Caleb Rackliffe > Priority: Normal > Fix For: 5.0.x, 5.x > > Attachments: ci_summary.html > > > Index and filtering queries have historically always been treated as range > reads. However, when they are restricted to a partition, there is no reason > they cannot be handled like single-partition reads, flowing through > {{StorageProxy#fetchRows()}}. The benefit of doing this is that we may be > able to take advantage of digest reads. The caveat is that this may not be > possible (or worthwhile) when, for instance, SAI queries do not use strict > filtering. When strict filtering is not active, we may need to filter > combined replica results at the coordinator even when there isn’t a digest > mismatch. When there is a digest mismatch, replica filtering protection will > kick in during the read repair process and safely resolve this. > tl;dr We can safely treat partition-restricted index/SAI/filtering queries as > single-partition reads, but initially it may be safest to do this only when > strict filtering is enabled. -- This message was sent by Atlassian Jira (v8.20.10#820010) --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@cassandra.apache.org For additional commands, e-mail: commits-h...@cassandra.apache.org