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Posted to commits@cassandra.apache.org by "Martin Hentschel (JIRA)" <ji...@apache.org> on 2010/08/11 16:23:19 UTC
[jira] Issue Comment Edited: (CASSANDRA-1311) Support
(asynchronous) triggers
[ https://issues.apache.org/jira/browse/CASSANDRA-1311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12897281#action_12897281 ]
Martin Hentschel edited comment on CASSANDRA-1311 at 8/11/10 10:21 AM:
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Uploaded a new patch, improvements to the last release:
* Updated to Cassandra revision 984391
* Reduced network traffic of notification messages (by bundling 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)
was (Author: hemartin):
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: https://issues.apache.org/jira/browse/CASSANDRA-1311
> 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:
> 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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