Marcel Reutegger created OAK-1342:
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Summary: 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
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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