48 Storage Management with DB2 for OS/390
Figure14. Displaya Data Class
Figure 15. DataClass DCDB2
6.1.3 SMS St orage Class

Some DB2 installations mayuse only one StorageClass for DB2, but in others,

the DB2 administratorsmay require several Storage Classes forDB2 table

spaces. Table12 on page 49 shows four examples.These are:

SCDBMED This Storage Classis intended for the majority of table spaces. It

provides good performance and good availability.

DATA CLASS APPLICATION SELECTION
Command ===>
To perform Data Class Operations,Specify:
CDS Name . . . . . . 'ACTIVE'
(1 to 44 character data set name or 'Active' )
Data Class Name . . DCDB2 (For Data Class List, fully or partially
specified or * for all)
Select one of the following options :
2 1. List - Generate a list of Data Classes
2. Display - Display a Data Class
3. Define - Define a Data Class
4. Alter - Alter a Data Class
If List Option is chosen,
Enter "/" to select option Respecify View Criteria
Respecify Sort Criteria
Data Class Name : DCDB2
Description : DATA CLASS FOR DB2TABLESPACES
Recorg . . . . . . . . . : LS
Recfm . . . . . . . . . :
Lrecl . . . . . . . . . :
Keylen . . . . . . . . . :
Keyoff . . . . . . . . . :
Space Avgrec . . . . . . : M
Avg Value . . . . : 1
Primary .....:1
Secondary . . . . : 1
Directory . . . . :
Retpd Or Expdt . . . . . :
Volume Count . . . . . . : 1
Add'l Volume Amount . :
Imbed . . . . . . . . . :
Replicate . . . . . . . :
CIsize Data . . . . . . : 4096
% Freespace CI . . . . . :
CA.....:
Shareoptions Xregion . . : 3
Xsystem . . : 3
Compaction . . . . . . . :