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https://issues.apache.org/jira/browse/OAK-1342?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcel Reutegger resolved OAK-1342.
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Resolution: Fixed
Resolving as fixed. Further improvements can be tracked with new issues.
> Cascading document history
> --------------------------
>
> Key: OAK-1342
> URL: https://issues.apache.org/jira/browse/OAK-1342
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, mongomk
> Reporter: Marcel Reutegger
> Assignee: Marcel Reutegger
> Priority: Blocker
> Fix For: 0.20
>
>
> The document history is current structured in a flat list of references from
> the main document to the previous documents (the _prev sub document).
> Garbage collection should make sure this list is kept within bounds, but
> there will still be documents with many valid changes that cannot be garbage
> collected easily. One example is the root document, which acts as the commit
> root for branches and their merge commits.
> To support many more changes on a document, the _prev list should be
> structured more similar to a b-tree with intermediate documents that can span
> multiple previous documents or other intermediate documents.
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