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From "Chetan Mehrotra (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (OAK-3085) Add timestamp property to journal entries
Date Fri, 10 Jul 2015 10:21:04 GMT

    [ https://issues.apache.org/jira/browse/OAK-3085?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14622095#comment-14622095
] 

Chetan Mehrotra commented on OAK-3085:
--------------------------------------

bq. Adding a new column at this point will create a backwards compatibility problem with existing
DBs. Do we really need it?

[~julian.reschke@gmx.de] This column is to be added for the table created for JournalEntry
which is a new table being introduced. So would it still pose backwards compatibility problem.
Also it seems that RDBDocumentStore is using same schema for all collections [1] which looks
incorrect. 

[1] http://markmail.org/thread/xratik7dsrw3o7og

> 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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