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https://issues.apache.org/jira/browse/OAK-4852?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Marcel Reutegger updated OAK-4852:
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Labels: scalability (was: )
> 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
> Labels: scalability
>
> 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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