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Toggling Between Online and Offline Mode

Use the onutil ALTER DBSPACE OFFLINE command to force a non-critical dbspace off-line. This command brings all of the chunks in a dbspace off-line regardless of the mirror status.

You can also use the onutil ALTER DBSPACE ONLINE command to bring all of the chunks in a dbspace online. However, you should use this command with great care. Forcing a dbspace online introduces the risk of inconsistencies between data stored in the dbspace you are forcing online and data stored in the rest of the server.

To eliminate the risk of data inconsistencies, you should perform a successful physical and logical restore on the dbspace from backup rather than use the ALTER DBSPACE ONLINE command. You can also eliminate the risk of data inconsistencies by limiting your use of the ALTER DBSPACE ONLINE command to read-only (static) dbspaces.

For more information on the use of these commands, see the IBM Informix: Extended Parallel Server Administrator's Reference.

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