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AdministeringIn addition to administering the database server, you can tune performance, replicate data, and archive data.
System administrationThese topics contain concepts, procedures, and reference information for database and database server administrators to use for managing and tuning HCL OneDB™ database servers.
Administrator's GuideThe HCL OneDB™ Administrator's Guide provides the information required to administer HCL OneDB™.
Fault tolerance
Using mirroring
Using mirroring
Mirroring the root dbspace during initialization

Mirroring the root dbspace during initialization

If you enable mirroring when you initialize the database server, you can also specify a mirror path name and offset for the root chunk. The database server creates the mirror chunk when the server is initialized. However, because the root chunk contains logical-log files, mirroring does not actually start until you perform a level-0 backup.

To specify the root mirror path name and offset, set the values of MIRRORPATH and MIRROROFFSET in the onconfig file before you start the database server.

If you do not provide a mirror path name and offset, but you do want to start mirroring the root dbspace, you must change the mirroring status of the root dbspace after the database server is initialized.