Chetan Mehrotra created OAK-2392:
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Summary: [DocumentMK] Garbage Collect older revisions of binary
properties in main document
Key: OAK-2392
URL: https://issues.apache.org/jira/browse/OAK-2392
Project: Jackrabbit Oak
Issue Type: Improvement
Components: mongomk
Reporter: Chetan Mehrotra
Assignee: Chetan Mehrotra
Priority: Minor
Fix For: 1.2
Current GC logic for DocumentMK only collects certain types of garbage (see
OAK-1981) and currently only split documents are removed. While complete full
blow gc would take time and yet not fully implemented we should handle those
documents which have binary properties and those properties get updated few
times (but not very frequently).
For e.g. performing a reindex for Lucene index would lead to removal of index
files nodes and again creation of nodes with same name. In such a case the
older revision of binary property would remain in main document and would not
be eligible for gc as per current impl.
As a fix the GC logic should look for document which might have binaries and
then remove the older revisions of binary properties. Currently we do scan all
such documents for Blob GC.
So this can be done either as part of Revision GC or Blob GC
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