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9-12 IBM Informix OnLine Database Server Administrator’s Guide
How to Set Up Multiple Residency
Step 2: Edit the Configuration File for the New OnLine
Use an operating-system editor to edit the parameters in the new configu-
ration file. Do not use DB-Monitor for this task. If you use DB-Monitor, you will
edit the values of the existing OnLine configuration file, and not the new one
as you intend. (DB-Monitor accesses the OnLine configuration indicated by
TBCONFIG at the time.)
In the new configuration file, change the following four configuration
parameters:
■ ROOTPATH
■ SERVERNUM
■ DBSERVERNAME
■ MSGPATH
ROOTPATH
The ROOTPATH parameter specifies the location of the root dbspace for this
OnLine database server. The root dbspace location must be unique for every
OnLine configuration.
Important: You can use the same value for ROOTPATH if you are nesting several root
dbspaces within the ROOTPATH partition. That is, if the value of ROOTSIZE and the
ROOTOFFSET define a unique portion of the partition, multiple OnLine database
servers can share the same ROOTPATH.
If the root dbspace is mirrored, you must also ensure that the location of the
root dbspace mirror, is unique. (The same situation exists if you are nesting
several mirrors within the same partition. MIRRORPATH need not be unique.)
Refer to page 1-21 for more general information about setting the value of
ROOTPATH and page 1-24 for more information about MIRRORPATH. Also
consider whether offsets to the root dbspace or its mirror are required. If
offsets are needed, specify them with the ROOTOFFSET and MIRROROFFSET
parameters.