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From "Martin Hentschel (JIRA)" <>
Subject [jira] Updated: (CASSANDRA-1311) Support (asynchronous) triggers
Date Wed, 11 Aug 2010 14:20:19 GMT


Martin Hentschel updated CASSANDRA-1311:

    Attachment: trunk-984391-update1.txt

Uploaded a new patch, improvements to the last release:

* Updated to Cassandra revision 984391
* Reduced network traffic of notification messages (by bundling of notifications and sending
only hash values)
* Faster storage of "dangling" triggers at a slave node (using Java collections instead of
Cassandra system tables because we don't need additional durability guarantees)

> Support (asynchronous) triggers
> -------------------------------
>                 Key: CASSANDRA-1311
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>          Components: Contrib
>            Reporter: Maxim Grinev
>             Fix For: 0.8
>         Attachments: HOWTO-PatchAndRunTriggerExample-update1.txt, HOWTO-PatchAndRunTriggerExample.txt,
ImplementationDetails-update1.pdf, ImplementationDetails.pdf, trunk-967053.txt, trunk-984391-update1.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:
> An example of using triggers for indexing:
> Implementation details are attached.

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