Marcel Reutegger created OAK-4852:
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Summary: Conditional update with relaxed cache consistency
Key: OAK-4852
URL: https://issues.apache.org/jira/browse/OAK-4852
Project: Jackrabbit Oak
Issue Type: New Feature
Components: core, documentmk
Reporter: Marcel Reutegger
With multiple DocumentNodeStore instances in a cluster, the root document can
become a bottleneck when many concurrent commits use it as a commit root.
The DocumentStore API currently requires that all operations that update
documents immediately reflect all changes from other cluster nodes. Either when
returning the before Document or implicitly via a subsequent find or query
operation that may be served from the cache.
However, the DocumentNodeStore only needs to see external changes on the root
node when it does a background read (or when it detects a collision). In almost
all cases it would be fine with an update operation that does not immediately
reflect external changes in the cache.
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