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From "Amit Jain (JIRA)" <j...@apache.org>
Subject [jira] [Assigned] (OAK-7083) CompositeDataStore - ReadOnly/ReadWrite Delegate Support
Date Fri, 04 May 2018 05:32:00 GMT

     [ https://issues.apache.org/jira/browse/OAK-7083?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Amit Jain reassigned OAK-7083:
------------------------------

    Assignee: Amit Jain  (was: Matt Ryan)

> CompositeDataStore - ReadOnly/ReadWrite Delegate Support
> --------------------------------------------------------
>
>                 Key: OAK-7083
>                 URL: https://issues.apache.org/jira/browse/OAK-7083
>             Project: Jackrabbit Oak
>          Issue Type: New Feature
>          Components: blob, blob-cloud, blob-cloud-azure, blob-plugins
>            Reporter: Matt Ryan
>            Assignee: Amit Jain
>            Priority: Major
>
> Support a specific composite data store use case, which is the following:
> * One instance uses no composite data store, but instead is using a single standard Oak
data store (e.g. FileDataStore)
> * Another instance is created by snapshotting the first instance node store, and then
uses a composite data store to refer to the first instance's data store read-only, and refers
to a second data store as a writable data store
> One way this can be used is in creating a test or staging instance from a production
instance.  At creation, the test instance will look like production, but any changes made
to the test instance do not affect production.  The test instance can be quickly created from
production by cloning only the node store, and not requiring a copy of all the data in the
data store.



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