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From "Jun Rao (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-3) Allow non-hash-based partitioning schemes to allow truly order-preserving storage
Date Thu, 26 Mar 2009 15:56:03 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-3?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12689521#action_12689521
] 

Jun Rao commented on CASSANDRA-3:
---------------------------------

The problem with OrderPreservingPartition is that it doesn't guarantee even distribution for
arbitrary keys.

> Allow non-hash-based partitioning schemes to allow truly order-preserving storage
> ---------------------------------------------------------------------------------
>
>                 Key: CASSANDRA-3
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-3
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Jonathan Ellis
>         Attachments: partition-1.patch, partition-2.patch, partition-3.patch, partition-4.patch,
partition-5.patch, partition-6.patch
>
>
> An order-preserving hash has too many limitations to be useful in production where key
lengths tend to have low variance.  We need to make Cassandra more flexible and define a partitioner
as responsible for String -> EndPoint instead of String -> BigInteger.

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