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Migrating and upgrading
You can upgrade to the 14.10 release of HCL Informix® or migrate from other database servers to Informix. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the Informix database server can affect upgrading from a previous release.
Migrating Informix® database systems
The Informix® Migration Guide describes how to move data manually between databases, servers, and computers.
Data migration utilities
The onrestorept utility
You can use the onrestorept utility to restore the database server back to the state that it was in just before the start of the failed upgrade.
Syntax of the onrestorept command
The onrestorept command undoes changes made during a failed upgrade, restoring files to the state they were in when you shut down the server.

Migrating and upgrading
You can upgrade to the 14.10 release of HCL Informix® or migrate from other database servers to Informix. Upgrading is an in-place migration method that uses your existing hardware and operating system software. Some changes to the Informix database server can affect upgrading from a previous release.
- Migrating Informix® database systems
  The Informix® Migration Guide describes how to move data manually between databases, servers, and computers.
  - Overview of migration
  - Migration to and reversion from 14.10
  - Migration of data between database servers
  - Data migration utilities
    - External tables
      External tables are a fast and versatile method for moving data between database servers. External tables are the fastest method for loading data into a RAW table with no indexes.
    - The dbexport and dbimport utilities
      The dbexport and dbimport utilities import and export a database and its schema to disk or tape.
    - The dbload utility
      The dbload utility loads data into databases or tables that Informix® products created. It transfers data from one or more text files into one or more existing tables.
    - The dbschema utility
      The dbschema utility displays the SQL statements (the schema) that are necessary to replicate database objects.
    - The LOAD and UNLOAD statements
      You can use the SQL LOAD and UNLOAD statements to move data. The LOAD statement is moderately fast and easy to use, but it only accepts specified data formats. You usually use the LOAD statement with data that is prepared with an UNLOAD statement.
    - The onunload and onload utilities
      The onunload and onload utilities provide the fastest way to move data between computers that use the same database server on the same platform.
    - The onmode utility reversion option
      You use the -b option of the onmode utility to revert to the older database server from which you converted.
    - The onrestorept utility
      You can use the onrestorept utility to restore the database server back to the state that it was in just before the start of the failed upgrade.
      - Syntax of the onrestorept command
        The onrestorept command undoes changes made during a failed upgrade, restoring files to the state they were in when you shut down the server.

Syntax of the onrestorept command

The onrestorept command undoes changes made during a failed upgrade, restoring files to the state they were in when you shut down the server.

onrestorept [ -V ] [ -c ] [ -y ]


Element	Purpose	Key Considerations
-V	Display the version of the current server and the software serial number.
-c	After a failed upgrade, delete the files in the directory specified in the RESTORE_POINT_DIR configuration parameter.	Before you begin another upgrade, you must delete these restore point files. Do this before you make another migration attempt, but not before your run the onrestorept utility to recover the files (if possible). If the upgrade was successful, restore point files are automatically deleted and there is no need to run onrestorept -c.
-y	Automatically accept every prompt while the onrestorept command runs.	If you do not specify -y, you must respond to every prompt.

Examples

The following command restores Informix® files after a failed upgrade:

onrestorept

The following command removes restore point files after a failed upgrade:

onrestorept -c