Migrating from DSE SOLR to Elasticsearch

The message store supports the following migration strategies:

Side by side migration



 Install an Elasticsearch cluster. 

 Install a Cassandra cluster. 

 Install a new message store. 

 Enable Elasticsearch, Cassandra and ISC on the new message store. 

 Migrate users from the old store to the new store with rehostuser. 

 Decommission the old store when all the users are migrated to the new store. 



In-place migration



 Install an Elasticsearch cluster. </li>

 Upgrade the messaging server to the latest version. </li>

 Enable Elasticsearch. </li>

 Enable ISC and impurge if it is not enabled. </li>

 Configure  if it is not configured </li>

 Restart the server. </li>

 Folders are scheduled for migration automatically when they are accessed. </li>

 Run &#x27;imcheck -H&#x27; to migrate all the folders. </li>

 Remove Solr configuration on the message store. </li>

 Disable Solr in DSE cluster, or remove the Solr DC and update the mbox keyspace accordingly </li>

</ul>

See also:
 * Elasticsearch options
 * ISC options