Thomas Mueller created OAK-120:
----------------------------------
Summary: MicroKernel API: specific retention policy of binaries
Key: OAK-120
URL: https://issues.apache.org/jira/browse/OAK-120
Project: Jackrabbit Oak
Issue Type: Improvement
Components: mk
Reporter: Thomas Mueller
A MicroKernel implementation needs to remove unused binaries. As the API
doesn't have a way to manually remove binaries (see also OAK-117), we need to
specify a retention policy (the rules for which binaries can be removed and
which ones need to be retained). The idea is that a MicroKernel implementation
uses a garbage collection algorithm to remove unused binaries from time to time.
There are two classes of binaries that need to be retained:
(A) binaries referenced within the nodes (as property values)
(B) temporary binaries (not [yet] referenced)
For (B) we could use the same retention policy as for revisions (keep temporary
binaries as long as old revisions are kept).
For (A) we need to specify the property value format, so the MicroKernel can
retain binaries based on the content. One idea is that binary values should be
kept if there is a node with property value ":blobId:<blobId>", or a node with
an array property value [..., ":blobId:<blobId>",...].
I will create a patch.
--
This message is automatically generated by JIRA.
If you think it was sent incorrectly, please contact your JIRA administrators:
https://issues.apache.org/jira/secure/ContactAdministrators!default.jspa
For more information on JIRA, see: http://www.atlassian.com/software/jira
