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From "Jonathan Ellis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-1311) Triggers
Date Wed, 15 May 2013 17:11:21 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-1311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13658547#comment-13658547
] 

Jonathan Ellis commented on CASSANDRA-1311:
-------------------------------------------

Looks reasonable.  Let's make sure we're not doing any additional allocation on the "no triggers"
path though. Let's also create follow-up tickets for loading new triggers from the directory
at runtime, and for creating an example trigger in contrib/.
                
> Triggers
> --------
>
>                 Key: CASSANDRA-1311
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1311
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Maxim Grinev
>            Assignee: Vijay
>             Fix For: 2.0
>
>         Attachments: 0001-1311-v3.patch, HOWTO-PatchAndRunTriggerExample.txt, HOWTO-PatchAndRunTriggerExample-update1.txt,
ImplementationDetails.pdf, ImplementationDetails-update1.pdf, trunk-967053.txt, trunk-984391-update1.txt,
trunk-984391-update2.txt
>
>
> Asynchronous triggers is a basic mechanism to implement various use cases of asynchronous
execution of application code at database side. For example to support indexes and materialized
views, online analytics, push-based data propagation.
> Please find the motivation, triggers description and list of applications:
> http://maxgrinev.com/2010/07/23/extending-cassandra-with-asynchronous-triggers/
> An example of using triggers for indexing:
> http://maxgrinev.com/2010/07/23/managing-indexes-in-cassandra-using-async-triggers/
> Implementation details are attached.

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