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From "Benedict (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (CASSANDRA-6935) Make clustering part of primary key a first order component in the storage engine
Date Tue, 15 Apr 2014 22:47:19 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6935?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Benedict reassigned CASSANDRA-6935:
-----------------------------------

    Assignee:     (was: Benedict)

> Make clustering part of primary key a first order component in the storage engine
> ---------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-6935
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6935
>             Project: Cassandra
>          Issue Type: Improvement
>          Components: Core
>            Reporter: Benedict
>              Labels: performance
>             Fix For: 3.0
>
>
> It would be helpful for a number of upcoming improvements if the clustering part of the
primary key were extracted from CellName, and if a ColumnFamily object could store multiple
ClusteredRow (or similar) instances, within which each cell is keyed only by the column identifier.
> This would also, by itself, reduce on comparison costs and also permit memory savings
in memtables, by sharing the clustering part of the primary key across all cells in the same
row. It might also make it easier to move more data off-heap, by constructing an off-heap
clustered row, but keeping the partition level object on-heap.



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