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Posted to commits@cassandra.apache.org by "Jonathan Ellis (JIRA)" <ji...@apache.org> on 2012/10/26 10:09:12 UTC

[jira] [Commented] (CASSANDRA-4865) Off-heap bloom filters

    [ https://issues.apache.org/jira/browse/CASSANDRA-4865?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13484775#comment-13484775 ] 

Jonathan Ellis commented on CASSANDRA-4865:
-------------------------------------------

Vijay, could you take a stab at this?  The bit arithmetic made my head hurt.  (may want to add a getInt method to Memory to avoid signed/unsigned messes...  then again maybe getByte is faster from native, no idea really.)
                
> Off-heap bloom filters
> ----------------------
>
>                 Key: CASSANDRA-4865
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4865
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Vijay
>             Fix For: 1.2.1
>
>
> Bloom filters are the major user of heap as dataset grows.  It's probably worth it to move these off heap.  No extra refcounting needs to be done since we already refcount SSTableReader.

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