[jira] [Updated] (CASSANDRA-9843) Augment or replace partition index with adaptive range filters

["Jonathan Ellis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/CASSANDRA-9843?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Jonathan Ellis updated CASSANDRA-9843:
--------------------------------------
    Labels: performance  (was: )

> Augment or replace partition index with adaptive range filters
> --------------------------------------------------------------
>
>                 Key: CASSANDRA-9843
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-9843
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: T Jake Luciani
>              Labels: performance
>
> 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



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