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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-4478) Make index_interval be measured in kb (instead of number of keys)
Date Mon, 12 May 2014 15:45:19 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-4478?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Jonathan Ellis updated CASSANDRA-4478:
--------------------------------------

    Fix Version/s:     (was: 2.1 rc1)
                   3.0

> Make index_interval be measured in kb (instead of number of keys)
> -----------------------------------------------------------------
>
>                 Key: CASSANDRA-4478
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-4478
>             Project: Cassandra
>          Issue Type: Improvement
>            Reporter: Sylvain Lebresne
>            Priority: Minor
>             Fix For: 3.0
>
>         Attachments: 4478-incomplete.txt
>
>
> Currently, index_interval is measured in number of keys: how may keys before adding an
entry to the index summary. After CASSANDRA-2319, each index entry also contains the columns
index for the row, so index entry can be a bit bigger and of differing sizes. Measuring in
number of keys is thus sub-optimal and difficult to tune, since you might want a different
setting depending of whether your rows are big or small, but the setting is global.
> So we should move to measuring the interval in bytes.



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