Welcome
Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
Backup and Restore Guide
The HCL® Informix® Backup and Restore Guide describes how to use the HCL Informix and ontape utilities to back up and restore database server data. These utilities enable you to recover your databases after data is lost or becomes corrupted due to hardware or software failure or accident.
ON-Bar backup and restore system
Restore data with ON-Bar
You can use the ON-Bar utility to restore data that was backed up by the ON-Bar utility.
onbar -r syntax: Restoring data
To run a complete restore, use onbar -r command.
Recreating chunk files during a restore
If the disk or file system fails, one or more chunk files might be missing from the dbspace. Use the -O option to recreate missing chunk files and any necessary directories during a restore.
Restoring when using raw chunks
You can recreate missing raw chunk files during a restore.

HCL Informix® V15.0.0 documentation
Welcome to the documentation for HCL Informix® 15.0.0 and related client tools and products.
Product overview
HCL Informix® is a fast and scalable database server that manages traditional relational, object-relational, and dimensional databases. Its small footprint and self-managing capabilities are suited to embedded data-management solutions.
Installing
These topics describe how to install HCL Informix® database servers, client products, and modules.
Administering
In addition to administering the database server, you can tune performance, replicate data, and archive data.
- System administration
  These topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL Informix® database servers.
- Backup and Restore Guide
  The HCL® Informix® Backup and Restore Guide describes how to use the HCL Informix and ontape utilities to back up and restore database server data. These utilities enable you to recover your databases after data is lost or becomes corrupted due to hardware or software failure or accident.
  - Overview of backup and restore
    These topics provide an overview of backup and restore concepts. They also provide information about planning for backup and restore operations.
  - ON-Bar backup and restore system
    - Overview of the ON-Bar backup and restore system
      consists of various components and it works with a storage manager to back up and restore data.
    - Configure the storage manager and ON-Bar
      The topics in this section provide the information that you need to plan and to set up with a storage manager.
    - Back up with ON-Bar
      You can use the utility to back up and verify storage spaces (dbspaces, blobspaces, and sbspaces) and logical-log files.
    - Restore data with ON-Bar
      You can use the ON-Bar utility to restore data that was backed up by the ON-Bar utility.
      - Pre-restore checklist
        Use this checklist to determine if a restore is necessary and to prepare for a restore.
      - Storage device availability
        Verify that the storage devices and files used in the backup are available for the restore.
      - onbar -r syntax: Restoring data
        To run a complete restore, use onbar -r command.
        Avoid salvaging logical logs
        The onbar -r command automatically salvages the logical logs. However, avoid salvaging logical logs in some situations.
        Performing a cold restore
        If a critical storage space is damaged because of a disk failure or corrupted data, you must perform a cold restore. If a disk fails, you need to replace it before you can perform a cold restore to recover data.
        Configuring a continuous log restore by using ON-Bar
        Use continuous log restore to keep a second system (hot backup) available to replace the primary system if the primary system fails.
        Restoring data by using a mixed restore
        You can use mixed restore to reduce the time until urgent data becomes online and available when you need to restore the server. Urgent data is data that you deem as critical to your business operation.
        Recreating chunk files during a restore
        If the disk or file system fails, one or more chunk files might be missing from the dbspace. Use the -O option to recreate missing chunk files and any necessary directories during a restore.
        Restoring when using cooked chunks
        You can recreate missing cooked chunk files during a restore.
        Restoring when using raw chunks
        You can recreate missing raw chunk files during a restore.
        Reinitializing the database server and restoring data
        Reinitializing disk space destroys all existing data managed by the database server. However, you can restore data from a backup that was performed before reinitialization.
      - Replacing disks during a restore
        You can replace disks during a restore by renaming chunks. You rename chunks by specifying new chunks paths and offsets during a cold restore with . This option is useful if you need to restore storage spaces to a different disk from the one on which the backup was made. You can rename any type of chunk, including critical chunks and mirror chunks.
      - Restoring to a different computer
        You can back up data on one computer and restore the data on a different computer. Importing a restore is useful for disaster recovery or upgrading a database server. After you back up your data and move over the storage-manager objects, you can perform an imported restore. An imported restore involves copying files from the source to the target computer and performing the restore in one of several ways.
      - onbar -RESTART syntax: Restarting a failed restore
        If a failure occurs with the database server, media, storage manager, or during a restore, you can restart the restore from the place that it failed. To restart a failed restore, the RESTARTABLE_RESTORE configuration parameter must be set to ON in the onconfig file when the restore fails.
      - Resolve a failed restore
        How you resolve a failed restore depends on the cause of the failure.
    - External backup and restore
    - Customize and maintain ON-Bar
    - ON-Bar catalog tables
      These topics describe the tables that are stored in the sysutils database.
    - ON-Bar messages and return codes
      prints informational, progress, warning, and error messages to the activity log file. return codes indicate the status of the command.
  - ontape backup and restore system
  - Backup and restore a Remote Secondary Server(RSS)
  - Integrated Backup Encryption
    These topics provide information about Integrated Backup Encryption.
  - HCL Informix® Primary Storage Manager
    HCL Informix® Primary Storage Manager is an application that manages storage devices used for backup and restore requests that are issued by . This storage manager supports both serial and parallel processing for backup and restore requests.
  - archecker table level restore utility
  - Backup and restore configuration parameter reference
  - Cloud Backup
    These topics provide information about storing and retrieving the backups directly to the ecosystem of selected cloud providers, namely Amazon S3 and Softlayer Object Storage.
  - Appendixes
- Enterprise Replication
  The describes the concepts of data replication using HCL Informix® Enterprise Replication, including how to design your replication system, as well as administer and manage data replication throughout your enterprise.
Migrating and upgrading
You can upgrade to the 15.0.0 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.
Client APIs and tools
You can use the HCL Informix® implementation of client APIs to develop applications for Informix database servers.
Embedding Informix®
When you embed HCL Informix®, you can use enterprise-class high-availability and high performance with embeddability features such as easy programmability, a small disk and memory footprint, and silent deployment.
Extending Informix®
Beyond standard relational database objects, HCL Informix® can be extended to handle specialized data types, access methods, routines, and other objects. Informix includes many built-in extensions that are fully integrated in the database server. Informix also provides modules, which are packages of extended database objects for a particular purpose and that are installed separately from the database server. Alternatively, you can create your own user-defined objects for Informix.
Data warehousing
In addition to designing and implementing Informix® dimensional databases, you can use tools to create data warehouse applications and optimize your data warehouse queries.
Designing databases
The first step in creating a relational database is to construct a data model, which is a precise, complete definition of the data you want to store. After you prepare your data model, you must implement it as a database and tables. To implement your data model, you first select a data type for each column and then you create a database and tables and populate the tables with data. You can also implement fragmentation strategies and control access to your data.
JSON compatibility
You can use the popular JSON-oriented query language created by MongoDB to interact with data stored in HCL Informix®.
Security
You can secure your Informix® database server and the data that is stored in your Informix databases. You can encrypt data, secure connections, control user privileges and access, and audit data security.
SQL programming
You can use the HCL Informix® implementation of the SQL language to develop applications for Informix database servers.
Troubleshooting HCL Informix®
Several troubleshooting techniques, tools, and resources are available for resolving problems that you encounter in your HCL Informix® database server environment.

Restoring when using raw chunks

You can recreate missing raw chunk files during a restore.

Procedure

To restore when using raw chunks:

Install the new disk.
For UNIX™, if you use symbolic links to raw devices, create new links for the down chunks that point to the newly installed disk.
restores the chunk file to where the symbolic link points.
Issue the onbar -r space command to restore the dbspace.