How to reindex Large Repository in CQ or CRX

Note: Please test this before using.

Re-indexing a large repository may take a lot of time and cause downtime. The below procedure allows to keep the production repository operational and do the re-indexing on a backup. Downtime of the production repository is limited to the time it takes to index changes that were done on the production system while the re-indexing was performed.

• Stop production repository
• Create a copy of the repository to a separate machine
• Start production repository again
• On the repository copy:
  • delete the index
  • start repository, which will start the indexing process
  • once repository is up and running (indexing completed), stop it again
• stop production repository
• replace crx-quickstart/repository/workspaces/crx.default/index with the one from the copy
• replace crx-quickstart/repository/revision.log with the one from the copy
• rename crx-quickstart/repository/cluster_node.id to crx-quickstart/repository/cluster_node.id.orig
• start production repository

At this point the repository will apply the changes to the index that were done since the copy was made.

• Once the repository is online, shut it down again.
• Delete crx-quickstart/repository/cluster_node.id
• Rename crx-quickstart/repository/cluster_node.id.orig to cluster_node.id