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From "Jonathan Ellis (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-1016) Coprocessors
Date Mon, 26 Apr 2010 14:28:32 GMT


Jonathan Ellis commented on CASSANDRA-1016:

yes, at the very least we need something that uses this before committing.  hand-waving that
"we should be able to implement X with this" doesn't cut it.

(to be more specific, we need an X, and we also need a good reason that we're not committing
premature generalization if X could be done more simply without the "framework" bits.)

> Coprocessors
> ------------
>                 Key: CASSANDRA-1016
>                 URL:
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Ryan King
>         Attachments: CASSANDRA-1016.patch
> As discussed at the Digg-hosted hackathon.
> First off, this needs a better name, the idea isn't exactly like coprocessors from BigTable
and this entry should be considered a stub for now (Stu and Marius should be able to provide
more details).
> The idea is that for mutation operations, we should all the user to run a routine that
has access to the "old" version of the data and the "new" version, and can take action.
> At a bare minimum, this should be capable of implementing distributed secondary indexes.

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