Using ISM Configuration Parameters to Change the Volume Pool Name

The following parameters, when listed in the ONCONFIG configuration file for the database server, affect how the ISM server handles backup and restore requests.

ONCONFIG Parameter

Effect on ISM Server

ISM_DATA_POOL

If present in the ONCONFIG file, this parameter specifies the volume pool to be used for backing up dbspaces and other storage spaces. The value for this parameter can be any volume pool that ISM recognizes. If this parameter is not present, ISM uses the ISMData volume pool.

ISM_LOG_POOL

If present in the ONCONFIG file, this parameter specifies the volume pool to be used for backing up logical logs. The value for this parameter can be any volume pool that ISM recognizes. If this parameter is not present, ISM uses the ISMLogs volume pool.

The following volume pool names are recommended:

• ISMData for storing storage spaces on nonfile-type devices
• ISMDiskData for storing storage spaces on file-type devices
• ISMLogs for storing logical logs on nonfile-type devices
• ISMDiskLogs for storing logical logs on file-type devices

You can direct storage-space and logical-log backups to the same device. In the following example, ISMDiskData is the volume pool name for both storage-space and logical-log backups. However, you can specify any volume pool name in the ONCONFIG file as follows:

ISM_DATA_POOL ISMDiskData
ISM_LOG_POOL ISMDiskData

If you change the name of either ISMData or ISMLogs, you must also complete the following steps:

• Update ISM_DATA_POOL and ISM_LOG_POOL in the ONCONFIG file with the new names.
• Change the create-bootstrap command in the onbar script ($INFORMIXDIR/bin/onbar or onbar.bat).

  For example, change ism_catalog -create_bootstrap -pool ISMData to ism_catalog -create_bootstrap -pool new_pool_name.

If you choose not to use ISM, remove the create_bootstrap command from the onbar script or onbar.bat script.

For information on the onbar script, see the IBM Informix: Backup and Restore Guide.