[jira] [Commented] (OAK-1312) Bundle nodes into a document

["Joel Richard (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/OAK-1312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14906328#comment-14906328 ] 

Joel Richard commented on OAK-1312:
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One approach to decide which nodes should be saved together in a document could be to leverage the node type and mixin information: If the type or mixins of a node allow or require certain child nodes, then these child nodes would be stored together with the parent node in a single document. Since a child node isn't read before it's parent anyway, nodes could still be retrieved in the old way.

Example: Since a node with access control needs to have the rep:AccessControllable mixin and the mixin suggests that a node with this mixin might have the rep:policy child node, these two nodes would be stored together.

> Bundle nodes into a document
> ----------------------------
>
>                 Key: OAK-1312
>                 URL: https://issues.apache.org/jira/browse/OAK-1312
>             Project: Jackrabbit Oak
>          Issue Type: Improvement
>          Components: core, mongomk
>            Reporter: Marcel Reutegger
>
> For very fine grained content with many nodes and only few properties per node it would be more efficient to bundle multiple nodes into a single MongoDB document. Mostly reading would benefit because there are less roundtrips to the backend. At the same time storage footprint would be lower because metadata overhead is per document.



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