Sybase IQ distributes user data across multiple disks at the application level by representing each device as a dbspace. A dbspace can be an operating system file or a raw disk partition. Dbspaces can contain both user data and internal database structures used for startup, recovery, backup, and transaction management.
PowerDesigner allows you to allocate tables and tables partitions, columns and column partitions, indexes, join indexes, keys, and references to specific dbspaces from each object's property sheet.
PowerDesigner models dbspaces as tablespaces with additional properties. You can create a dbspace in any of the following ways:
PowerDesigner models dbspaces as tablespaces (see Tablespaces and Storages (PDM)) with the following additional properties on the General tab (v15.0 and higher):
Property | Description |
---|---|
Catalog store |
Specifies that the dbspace is created for the catalog store and will contain a single dbfile. If you select this option, you must specify a path to the file. Scripting name: CatalogStoreDisplay |
File path |
Specifies a physical file path for the dbspace. Scripting name: As |
Online |
Specifies that the dbspace is online. Scripting name: Online |
Read-only |
Specifies that the online dbspace is read-only. Scripting name: ReadOnly |
Striping |
Specifies that the dbspace is available for striping. Scripting name: Striping |
Stripe size (in kb) |
Specifies the size of the stripes. Scripting name: Stripesizekb |
PowerDesigner models dbspace files as extended objects with a stereotype of <<DBSpaceFile>> with the following additional properties on the General tab (v15.0 and higher):
Property | Description |
---|---|
Path |
Specifies the file path to the dbspace file. Scripting name: FilePath |
Read-only |
Specifies that the resource is read-only. Scripting name: ReadOnly |
Size |
Specifies that the size of the dbspace file. Scripting name: Size, SizeUnit |
Reserve |
Specifies the size of space to reserve, so that the dbspace can be increased in size in the future. Scripting name: Reserve, ReserveUnit |