[OAK-4761] Reduce the number of calls to /jcr:system/jcr:versionStorage during the upgrade

• Type: Improvement
• Status: Closed
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 1.4.12, 1.5.10, 1.6.0
• Component/s: upgrade
• Assignee: Tomek Rękawek
• Reporter: Tomek Rękawek
• Created: 06/Sep/16 09:32
• Updated: 16/Dec/16 11:19
• Resolved: 06/Sep/16 09:39

Description

Each time a version history is copied during the upgrade, the copier tool has to traverse /jcr:system/jcr:versionStorage ancestors to get the appropriate nt:versionHistory node. It can be optimized by reading the versionStorage node once and re-using it. As a result, all methods related to copying versions should accept versionStorage rather than rootNode as their parameters.

Issue Links

• Is contained by: OAK-5290 Backport the performance improvements for oak-upgrade from trunk