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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] Commented: (CASSANDRA-1684) Entity groups
Date Fri, 11 Mar 2011 14:20:59 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1684?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13005650#comment-13005650
] 

Jonathan Ellis commented on CASSANDRA-1684:
-------------------------------------------

By "like App Engine [megastore]" we only mean "atomic within a group" not "consistent and
isolated within a group."  the former is useful even without the latter.

> Entity groups
> -------------
>
>                 Key: CASSANDRA-1684
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1684
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Core
>            Reporter: Jonathan Ellis
>            Assignee: Sylvain Lebresne
>             Fix For: 0.8
>
>   Original Estimate: 80h
>  Remaining Estimate: 80h
>
> Supporting entity groups similar to App Engine's (that is, allow rows to be part of a
parent "entity group," whose key is used for routing instead of the row itself) allows several
improvements:
>  - batches within an EG can be atomic across multiple rows
>  - order-by-value queries within an EG only have to touch a single replica even with
RandomPartitioner

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