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From "Tony Brusseau (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (DERBY-6135) Request data compression scheme (i.e., gzip of data pages)
Date Tue, 16 Apr 2013 18:39:16 GMT

    [ https://issues.apache.org/jira/browse/DERBY-6135?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13633157#comment-13633157
] 

Tony Brusseau commented on DERBY-6135:
--------------------------------------

No, the id's never start anywhere near 0. The upper 8 bits of the long is used to represent
type info, and the numbers grow normally from there. So the upper byte and lower 3-4 bytes
always have relevant data bits set.
                
> Request data compression scheme (i.e., gzip of data pages)
> ----------------------------------------------------------
>
>                 Key: DERBY-6135
>                 URL: https://issues.apache.org/jira/browse/DERBY-6135
>             Project: Derby
>          Issue Type: Improvement
>          Components: Store
>            Reporter: Tony Brusseau
>
> This is a request for a data compression scheme facility added to Derby (something like
gzip of data pages). MySQL and some other databases provide such a feature, see:
> http://dev.mysql.com/doc/innodb-plugin/1.0/en/innodb-compression-internals.html
> The desire for this is because my current database size is 27GB but gzipped, it goes
down to 7GB. I wish to scale my database dramatically, but the current disk footprint would
prevent me from being able to use Derby.

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