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https://issues.apache.org/jira/browse/OAK-3085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14622086#comment-14622086
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Julian Reschke commented on OAK-3085:
-------------------------------------
It's a unix timestamp with 5s resolution, maintained by the DocumentStore.
> Add timestamp property to journal entries
> -----------------------------------------
>
> Key: OAK-3085
> URL: https://issues.apache.org/jira/browse/OAK-3085
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Components: core, mongomk
> Affects Versions: 1.2.2, 1.3.2
> Reporter: Stefan Egli
> Fix For: 1.2.3, 1.3.3
>
> Attachments: OAK-3085.patch, OAK-3085.v2.patch
>
>
> OAK-3001 is about improving the JournalGarbageCollector by querying on a
> separated-out timestamp property (rather than the id that encapsulated the
> timestamp).
> In order to remove OAK-3001 as a blocker ticket from the 1.2.3 release, this
> ticket is about adding a timestamp property to the journal entry but not
> making use of it yet. Later on, when OAK-3001 is tackled, this timestamp
> property already exists and migration is not an issue anymore (as 1.2.3
> introduces the journal entry first time)
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