Each object stored in the OAM storage hierarchy is a member of
a collection. The name of the collection to which an object belongs
is recorded in the object’s directory entry as a collection name
identifier. The collection name identifier table maps the identifier
to the collection name (see Table 1). In addition, the
collection name identifier table contains information about the storage
class and management class for the collection and the name of the
storage group that contains all members of the collection (see Table 2).
Table 1. Collection
name identifier table| Column description |
Column name |
DB2 field
type and data size |
Max byte |
Index structure |
|---|
| Storage Class
Name |
ODCLSCNM |
VARCHAR (30) |
(32) |
|
| Management
Class Name |
ODCLMCNM |
VARCHAR (30) |
(32) |
|
| Directory Token
(*) |
ODCLSGNM |
VARCHAR (30) |
(32) |
ASC |
| Collection
Name Identifier (*) |
ODCLID |
INTEGER (4) |
(4) |
Unique ASC
Cluster |
| Collection
Name (*) |
ODCLNAME |
VARCHAR (44) |
(46) |
Unique ASC |
| Total Bytes
per Table Entry |
138 |
146 |
|
|
Table 2. Collection name identifier
table contents| Column description |
Contents |
|---|
| Storage Class
Name |
Default initial
storage class for all objects in this collection (can be overridden
by explicit storage class on OSREQ STORE) |
| Management
Class Name |
Default initial
management class for all objects in this collection (can be overridden
by explicit management class on OSREQ STORE) |
| Directory Token |
Storage group
name |
| Collection
Name Identifier |
Numeric index
identifying the collection that includes this object (used to improve
DASD space usage in object tables) |
| Collection
Name |
Standard MVS
data set name |