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From "Jonathan Ellis (Commented) (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-4023) Improve BloomFilter deserialization performance
Date Fri, 23 Mar 2012 22:33:28 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-4023?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13237226#comment-13237226
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Jonathan Ellis commented on CASSANDRA-4023:
-------------------------------------------

Is this io-reducing something that could also apply to 1.0?
                
> Improve BloomFilter deserialization performance
> -----------------------------------------------
>
>                 Key: CASSANDRA-4023
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4023
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>    Affects Versions: 1.0.1
>            Reporter: Joaquin Casares
>            Assignee: Yuki Morishita
>            Priority: Minor
>              Labels: datastax_qa
>             Fix For: 1.0.9, 1.1.0
>
>         Attachments: 0001-fix-loading-promoted-row-index.patch, 4023.txt, cassandra-1.0-4023-v2.txt,
cassandra-1.0-4023-v3.txt
>
>
> The difference of startup times between a 0.8.7 cluster and 1.0.7 cluster with the same
amount of data is 4x greater in 1.0.7.
> It seems as though 1.0.7 loads the BloomFilter through a series of reading longs out
in a multithreaded process while 0.8.7 reads the entire object.
> Perhaps we should update the new BloomFilter to do reading in batch as well?

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