[CASSANDRA-9843] Augment or replace partition index with adaptive range filters

• Type: New Feature
• Status: Open
• Priority: Normal
• Resolution: Unresolved
• Component/s: Legacy/Core
• Labels: performance
• Assignee: Unassigned
• Reporter: Jonathan Ellis
• Created: 18/Jul/15 04:01
• Updated: 16/Apr/19 09:31

Description

Adaptive range filters are, in principle, bloom filters for range queries. They provide a space-efficient way to avoid scanning a partition when we can tell that we do not contain any data for the range requested. Like BF, they can return false positives but not false negatives.

The implementation is of course totally different from BF. ARF is a tree where each leaf of the tree is a range of data and a bit, either on or off, denoting whether we have some data in that range.

ARF are described here: http://www.vldb.org/pvldb/vol6/p1714-kossmann.pdf

Issue Links

• is related to: CASSANDRA-10295 Support skipping MV read-before-write on a per-operation basis
• is related to: CASSANDRA-9754 Make index info heap friendly for large CQL partitions