[jira] Updated: (COUCHDB-554) RFC3284 support for delta-based attachment updates

["Paul Joseph Davis (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/COUCHDB-554?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Paul Joseph Davis updated COUCHDB-554:
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    Skill Level: Regular Contributors Level (Easy to Medium)

> RFC3284 support for delta-based attachment updates
> --------------------------------------------------
>
>                 Key: COUCHDB-554
>                 URL: https://issues.apache.org/jira/browse/COUCHDB-554
>             Project: CouchDB
>          Issue Type: New Feature
>          Components: Database Core
>            Reporter: Robert Newson
>
> I was thinking about being to update an attachment with a binary diff instead of a full upload (in those cases where the diff would be much smaller, of course). RFC3284 (http://www.faqs.org/rfcs/rfc3284.html) seems to document a generic syntax for describing a patch.
> The idea is that you would PUT an encoded diff as the body instead of sending the full bytes. If the attachment's revision matches your PUT's revision, then CouchDB will apply the delta to its locally stored version to make the new version. As a further option, CouchDB could store the delta itself and apply it on fetch. This might complicate compaction, though.

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