Offline compaction

Offline compaction :

Few may face issues with disk space issue on Segment store folder .

To reduce space , AEM has provided with compaction tool. This post explains about offline compaction techniques.

Steps to perform offline compaction:

•  Download and install latest oak-run . Please visit below URL to check the updates
  https://repository.apache.org/content/repositories/releases/org/apache/jackrabbit/oak-run/
• Stop the AEM instance.
• Backup the instance .
• Check the size before running command
• Run the below command
  • java -jar oak-run-x.x.xx.jar checkpoints <segmentstore path>
  • java -jar oak-run-x.x.xx.jar  checkpoints <segmentstore path>  rm-unreferenced
  • java -jar oak-run-x.x.xx.jar  compact <segmentstore path>
• Start the instance.
• Check the segment store size.

Explanation:

• First command will identify the older checkpoints.
• Second command, checks for unreferenced checkpoints and remove them
• Compact the segment store.