# Automatic Migration To Indexing V2 During Upgrades

Applies to: DB2, Oracle

## Indexing V2 Migration Behavior

During a client software upgrade, only database instances that use indexing V1 are evaluated for migration to indexing V2. Other packages on the same client are not affected.

## Migration Behavior

- The system attempts the migration automatically during the client upgrade.

- If any database instance on the client uses Snap and has a pending backup copy, the migration is skipped for the entire client. All database instances continue to use indexing V1.

- If the migration is skipped, the system retries the migration during the next client software upgrade.

## Snap-enabled Subclients

For Snap-enabled subclients, the first backup after a successful migration is a full backup to ensure data consistency.

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