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https://issues.apache.org/jira/browse/OAK-1312?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15434914#comment-15434914
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Julian Reschke edited comment on OAK-1312 at 10/19/16 11:50 AM:
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Just a quick note: with the implementation, we can have potential holes in
documents - say we have {{/a, /a/b and /a/b/c}} and {{/a/b}} is bundled with
{{/a}}. Then we'd only have documents - {{0:/, 1:/a, 3:/a/b/c}}.
While that, of course, is ok, but we would need to factor this at least in
oak-mongo.js (I can't recall any place else right now) which loops recursively
at quite a few places with breaking the loop if no docs are found at a given
depth.
was (Author: catholicon):
Just a quick note: with the implementation, we can have potential holes in
documents - say we have {{/a, /a/b and /a/b/c}} and {{/a/b}} is bundled with
{{/a}}. Then we'd only have documents - {{0:/, 1:/a, 3:/a/b/c}}.
Whlie that, of course, is ok, but we would need to factor this at least in
oak-mongo.js (I can't recall any place else right now) which loops recursively
at quite a few places with breaking the loop if no docs are found at a given
depth.
> 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, documentmk
> Reporter: Marcel Reutegger
> Assignee: Chetan Mehrotra
> Labels: performance
> Fix For: 1.6
>
> Attachments: OAK-1312-meta-prop-handling.patch,
> OAK-1312-review-v1.diff, OAK-1312-review-v2.diff, benchmark-results.txt,
> run-benchmark.sh
>
>
> 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.
> Feature branch -
> https://github.com/chetanmeh/jackrabbit-oak/compare/trunk...chetanmeh:OAK-1312
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