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Posted to oak-issues@jackrabbit.apache.org by "Marcel Reutegger (JIRA)" <ji...@apache.org> on 2016/09/26 14:39:20 UTC
[jira] [Created] (OAK-4852) Conditional update with relaxed cache
consistency
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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