Home
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
Mirroring
Mirroring process
Mirror status flags

Mirror status flags

Dbspaces, blobspaces, and sbspaces have status flags that indicate whether they are mirrored or unmirrored.

You must perform a level-0 backup of the root dbspace before mirroring starts.

Chunks have status flags that indicate the following information:

Whether the chunk is a primary or mirror chunk
Whether the chunk is currently online, down, a new mirror chunk that requires a level-0 backup of the root dbspace, or in the process of being recovered

For descriptions of these chunk status flags, see the description of the onstat -d option in the HCL OneDB™ Administrator's Reference. For information about how to display these status flags, see Monitor disk usage.