Upgrading to i2 Analyze version 4.3.1

When you upgrade your deployment to i2 Analyze version 4.3.1, Solr is also upgraded to version 8. Any search indexes created in Solr 6 are not compatible with Solr 8. As part of the upgrade process, you must recreate the index.

There are two approaches that you can use to perform the upgrade:
Offline reindex
If your system can be taken offline while the upgrade is completed, you can stop your system, upgrade your deployment, and reindex the data in your Information Store. The time that it takes to complete the reindex of your data depends on the quantity of data. While the data is being indexed, the system is unavailable to analysts.

To complete the offline reindex, follow the instructions in Upgrading to i2 Analyze 4.3.1 offline.

Online reindex
If your system must be available for use while the reindex is completing, you can create a second system alongside your current system, and use that system to create an index of your data from a copy of your Information Store database. After the indexing process is complete, you can update your production system to use the new index. In this approach, your production system is down for a short time to complete the upgrade of the application, but it is still available to analysts while the index is created.

To complete the online reindex, follow the instructions in Upgrading to i2 Analyze 4.3.1 online.

Regardless of which upgrade approach you choose, before you upgrade your production deployment use a pre-production or test environment to perform the upgrade first to test that you can complete the upgrade process successfully and that you are familiar with it. After you test the upgrade process for your deployment, complete the upgrade in your production environment. If you do not have a pre-production or test environment, you can create one. For more information, see Creating a production deployment.

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