cassandra-commits mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Jonathan Ellis (JIRA)" <>
Subject [jira] [Commented] (CASSANDRA-6633) Investigate Bloom Filter Improvements
Date Thu, 13 Mar 2014 21:29:49 GMT


Jonathan Ellis commented on CASSANDRA-6633:

so, close this as Later or Notaproblem?

> Investigate Bloom Filter Improvements
> -------------------------------------
>                 Key: CASSANDRA-6633
>                 URL:
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Benedict
> Investigate various possible improvements to our bloom filters:
> 1) Dynamic resizing would be useful. There are a few ways this could be achieved: with
some modification, downsampling could be supported; partitioning the hash functions so that
we may select the number of hashes/bits dynamically, by loading/unloading a given partition;
and there are some related data structures, such as Quotient Filters that support resizing
and merging.
> 2) Faster loading: should be possible to mmap the bloom filter representation on disk
> 3) Most ambitious of all, would be to try to reduce the memory requirement of bloom filters.
Golomb Coded Sets [1|]
are a possibility, as are other compressed hash structures [2|].

This message was sent by Atlassian JIRA

View raw message