# Upgrade your IDOL Index to version 12.x

The simplest way to upgrade the IDOL Content component index is to index data into a fresh installation of IDOL 12, while also activating any further functionality that is appropriate for your use case. However, IDOL 12 is also fully compatible with existing installations and indexes, so you do not need to reindex, as long as you include certain configuration settings before you run the IDOL 12 executable.

## Upgrade from IDOL 11.x

There are no new configuration changes required for compatibility when upgrading from an IDOL 11.x index to an IDOL 12.x index, unless you want to activate new functionality.

IMPORTANT: If you want to use the new index encryption functionality with IDOL 12.x, you must reindex your data to ensure that the encryption applies to your whole index. If you turn on encryption for an existing index, Content encrypts new data in the main index, while leaving existing content unencrypted.

To ensure that all your data is encrypted, Micro Focus recommends that you reindex your data into an empty index.

For more information about index encryption, refer to the IDOL Server Administration Guide and the IDOL Server Reference.

As with all IDOL 12.x components, if you use JSON response formats, you might need to modify your front end applications, or configure the IDOL Content component to use the older response format. For more information, refer to the IDOL 12.x Upgrade Tech Note.

## Upgrade from IDOL 10.x

If you upgrade an existing index by replacing the IDOL 10.x executable files with newer 12.x executables, you might need to make some modifications to your configuration file.

You must add the following configuration parameter to the Content component configuration file unless a different value is already present. If you create a new IDOL index, you can ignore this step.

    [Server]
    ParametricMaxPairsPerDocument=104858

## Upgrade from IDOL 7.x

If you upgrade an existing index by replacing the IDOL 7.x executable files with newer 12.x executables, you might need to make some modifications to your configuration file.

You must add the following configuration parameters to the Content component configuration file unless a different value is already present. If you create a new IDOL index, you can ignore this step.

    [Server]
    RepositoryStorage=FALSE
    SplitNumbers=TRUE
    DiskHash=1000000
    RefHashes=10000000
    IndexFieldCheckSum=TRUE
    BestTermCaching=TRUE
    ParametricMaxPairsPerDocument=104858

For more information about the differences in index format between IDOL 7 and later versions, see Repository Storage Mode.

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