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https://issues.apache.org/jira/browse/OAK-3107?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Francesco Mari reopened OAK-3107:
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> SegmentWriter should be able to store blob IDs longer than 4096 bytes
> ---------------------------------------------------------------------
>
> Key: OAK-3107
> URL: https://issues.apache.org/jira/browse/OAK-3107
> Project: Jackrabbit Oak
> Issue Type: Improvement
> Reporter: Francesco Mari
> Assignee: Michael Dürig
> Fix For: 1.3.3
>
> Attachments: OAK-3107-01.patch
>
>
> The {{SegmentWriter}} is able to store blob IDs that are no longer than 4096
> bytes, but some implementation of {{BlobStore}} may return blob IDs 4096
> bytes long (or more).
> It should be possible to use a different encoding for long blob IDs. The blob
> IDs should be written as a string (using {{SegmentWriter#writeString}}), and
> its reference ID embedded into a value record.
> The encoding in this case should be something like the following:
> {noformat}
> 11110 + 3bit + 3byte
> {noformat}
> where the three least significant bits of the first bytes are actually
> unused, and the three bytes are used to store the record ID of the string
> representing the blob ID.
> This new encoding is necessary to maintain backwards compatibility with the
> current way of storing blob IDs and to give a way to {{SegmentBlob}} to
> recognise this new encoding.
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