Preparing for the migration
Before you migrate to a newer version of Web Services and Applications, review the following considerations and recommendations for how to prepare for the migration.
Preserving Cassandra data through the migration
We recommend that you backup Cassandra data before a migration. Cassandra data is kept in place during a migration, therefore, you don't need to perform any special action to keep the data through a migration. However, a data backup to rollback to is required in the event of a failed migration. For this reason, we recommend taking a Cassandra snapshot before you start the migration.
Instructions for how to take a snapshot depends on which Cassandra version is in use. Choose one of the following procedures:
Do I need to back up customizations before a migration?
You don't need to create a backup of your customizations before a migration. Migration from 8.5.2.09 includes a transition to embedded Jetty. This creates a new set of configuration files; therefore existing customizations for 8.5.2.09 are maintained. The GWS service must be configured from scratch. For more information, see transition to embedded Jetty.