Preparing to mirror data
About this task
This section describes how to start mirroring data on
a database server that is not running with the mirroring function
enabled.
To prepare to mirror data:
Procedure
- Take the database server offline and enable mirroring.
- Bring the database server back online.
- Allocate disk space for the mirror chunks.
You
can allocate this disk space at any time, as long as the disk space
is available when you specify mirror chunks in the next step. The
mirror chunks must be on a different disk than the corresponding primary
chunks. See Allocate disk space for mirrored data.
- Choose the dbspace, blobspace, or
sbspace that you want to mirror, and specify a mirror-chunk path name
and offset for each primary chunk in that storage space.
The
mirroring process starts after you perform this step. Repeat this
step for all the storage spaces that you want to mirror. See Using mirroring.
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