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From "Krishna Kumar (Updated) (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (HIVE-2623) Add Integer type compressors
Date Mon, 05 Dec 2011 08:15:40 GMT

     [ https://issues.apache.org/jira/browse/HIVE-2623?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Krishna Kumar updated HIVE-2623:
--------------------------------

    Attachment: steppedpowerlaw.gz

Synthetic data for elias gamma.

Storage size when stored as rc files (single field record):

plain: 188320
gzip: 61280
bzip2: 44023
uber+eliasgamma: 35963

Actual gains in production will depend upon actual probability distributions + size of other
columns.
                
> Add Integer type compressors
> ----------------------------
>
>                 Key: HIVE-2623
>                 URL: https://issues.apache.org/jira/browse/HIVE-2623
>             Project: Hive
>          Issue Type: Sub-task
>          Components: Query Processor, Serializers/Deserializers
>            Reporter: Krishna Kumar
>            Assignee: Krishna Kumar
>            Priority: Minor
>         Attachments: HIVE-2623.v0.patch, steppedpowerlaw.gz
>
>
> Type-specific compressors for integers.
> Starting with elias gamma which prefers small values as per a power-law like distribution.


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