Hierarchical map-reduce
-----------------------
Key: JCR-2660
URL: https://issues.apache.org/jira/browse/JCR-2660
Project: Jackrabbit Content Repository
Issue Type: New Feature
Components: jackrabbit-core
Reporter: Jukka Zitting
Fix For: 2.2.0
As discussed on a few occasions earlier, it would be great to have a feature
that allows efficient and automatic processing of information over entire
subtrees of content. Such a feature could be used to maintain custom reports,
search indexes, and other summary information for selected subtrees.
The map-reduce paradigm works great for such a purpose, as you can combine a
per-node map operation with a reduce operation that combines the map results of
the children of a given parent node. It's easy to generalize this model to
cover entire subtrees. And if the reduced information is stored as a part of
each parent node, it's even possible to incrementally update the results for an
entire subtree when just a part of the subtree is modified.
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
