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Migrating and upgradingYou can upgrade to the 2.0.0.0 version of HCL OneDB™ or migrate from other database servers to HCL OneDB™. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the HCL OneDB™ database server can affect upgrading from a previous release.
HCL OneDB™ Migration GuideThe HCL OneDB™ Migration Guide describes how to move data manually between databases, servers, and computers.
Migration to OneDB 2.0.0.0
Preparing for migration to OneDB 2.0.0.0Before you install the new version of HCL OneDB™, you must prepare the database server environment for migration by performing specified pre-migration tasks. If you are also migrating from 32-bit to 64-Bit database servers, you must perform additional tasks.
Preparing for migrationPreparing for migration includes gathering information about and backing up your data, so that you can reinstall the previous version of the server and restore your data if you have a migration problem. Preparing for migration is crucial for successful migration.
Saving a copy of the storage manager sm_versions fileBefore you migrate to a later version of the database server, save a copy of your current sm_versions file, which should be in the $INFORMIXDIR/etc directory.

Saving a copy of the storage manager sm_versions file

Before you migrate to a later version of the database server, save a copy of your current sm_versions file, which should be in the $INFORMIXDIR/etc directory.

The HCL OneDB™ Primary Storage Manager does not use the sm_versions file. If you plan to use the OneDB Primary Storage Manager, you do not need the sm_versions file. However, if you use the Tivoli® Storage Manager or a third-party storage manager, you do need the sm_versions file.

If you are using a different directory as INFORMIXDIR for the new database server, copy sm_versions to the new $INFORMIXDIR/etc, or copy sm_versions.std to sm_versions in the new directory, and then edit the sm_versions file with appropriate values before starting the migration.

For information about how to install and use the HCL OneDB Storage Manager, see the .

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