Root Dbspace

The first storage space that you allocate is called the root database space, or root dbspace. It stores all the basic information that describes your database server. Use the following parameters to describe the root dbspace.

Configuration
Parameter

Description

ROOTNAME

Specifies the name of the root dbspace. You can choose any descriptive name for ROOTNAME, but it is usually called rootdbs. For more information, see Root Dbspace.

The ROOTNAME parameter overrides the ROOTSLICE parameter for a particular coserver specified in the ONCONFIG file. You can choose any descriptive name for the ROOTNAME, but it must be unique for each coserver in the instance. The maximum length of ROOTNAME is 128 characters.

ROOTOFFSET

Specifies an offset in kilobytes. For information about when to set ROOTOFFSET, refer to Specifying an Offset.

When they are global parameters, each root dbspace has the same offset on disk for each coserver. You can override the global values within each coserver-specific section of the ONCONFIG file.

ROOTPATH

Specifies the pathname of the storage allocated to the root dbspace. For information on how to choose and allocate the storage, see Allocating Disk Space.

The ROOTPATH is unique within a single coserver. The pathname can be the same for all coservers. The operating system keeps track of the actual disk that the node owns.

ROOTSIZE

Specifies the amount of space allocated to the first chunk of the root dbspace, or "root chunk". For information on how to choose an appropriate size for the root chunk, see Size of the Root Dbspace.

When they are global parameters, each root chunk is the same size for each coserver. You can override the global values within each coserver-specific section of the ONCONFIG file.

ROOTSLICE

Specifies a name for the root dbslice. The ROOTSLICE parameter is mutually exclusive with the ROOTNAME coserver-specific configuration parameter. You cannot specify ROOTSLICE in the coserver-specific section of the ONCONFIG file. The maximum length of ROOTSLICE is 128 characters. For more information, see Rootslices.