The Hot Standby software supplies default values for most of the
master and standby database attributes and maintains them in the
database root file. Optionally, you can change one or more of the
database attributes using qualifiers on the Replicate commands.
When you specify a database attribute, the Hot Standby software
updates the database root file so that the database root file
always contains the most up-to-date qualifier values for the
database.
You can specify database attributes using qualifiers on either of
the following Replicate commands:
o Replicate After_Journal Configure-Preconfigures the master
and standby database attributes without starting replication
operations. This optional command allows you to preset
database attributes that do not take effect until the next
time you start replication operations using the Replicate
After_Journal Start command.
o Replicate After_Journal Start-Configures database attributes
at the same time you start replication for a database. If you
preconfigured your database previously using the Replicate
After_Journal Configure command, you can override the default
settings by including one or more qualifiers on the Replicate
After_Journal Start command.
Whenever you enter the Replicate After_Journal Start command,
the Hot Standby software initiates database replication using
the qualifier values specified on the Replicate After_Journal
Start command line. If you do not specify qualifier values on the
command line, the Hot Standby software uses values stored in the
database root file or the default value for the qualifier.
Therefore, you do not need to respecify the qualifier values
except to change a qualifier setting. For example, the following
command example shows the Replicate After_Journal Start command
the first time you enter it on the master database node:
$ RMU/REPLICATE AFTER_JOURNAL START mf_personnel -
/STANDBY_ROOT=REMNOD::DISK1:[USER]standby_personnel -
/SYNCHRONIZATION=HOT
The Hot Standby software saves the qualifier settings in the
database root file (in this case, the database attributes are
saved in the master database root file). The next time you start
replication operations, you could enter the command line without
the qualifier.