The first application that connects to a cache structure allocates the structure and defines its attributes. Subsequent connectors to the structure use the structure as it has been allocated by the first connector. The following IXLCONN parameters define the attributes of the cache structure or its connector:

ALLOWDUPREBLD

Specifies whether this connection allows user-managed duplexing rebuild to be initiated for the cache structure.

ELEMCHAR or ELEMINCRNUM

Specifies the data element size for the cache structure.

MAXELEMNUM

Specifies the maximum number of data elements per data entry. For a coupling facility of CFLEVEL=0, the maximum number can be from 1 to 16. For a coupling facility of CFLEVEL=1 or higher, the maximum number can be from 1 to 255.

DIRRATIO

Specifies the directory component of the directory-to-element ratio.

ELEMENTRATIO

Specifies the element component of the directory-to-element ratio.

ADJUNCT

Specifies whether the cache structure is to contain adjunct areas.

VECTORLEN

Specifies the maximum number of data items for which the connection can have concurrent registration.

NUMCOCLASS

Specifies the maximum number of cast-out classes that can be used by the connection.

NUMSTGCLASS

Specifies the maximum number of storage classes that can be used by the connection.

UDFORDER

Specifies whether a user data field (UDF) order queue should be maintained for each cast-out class for the structure. Applicable only to cache structures allocated in a coupling facility with CFLEVEL=5 or higher.

NAMECLASSMASK

Specifies the name class mask pattern definition to be applied to entry names at connect time. Name classes are used by the coupling facility to assign each entry to a name class within the structure. Name classes can be used to improve the processing efficiency of IXLCACHE REQUEST=DELETE_NAME command. Applicable only to cache structures allocated in a coupling facility with CFLEVEL=7 or higher.

SUPPRESSEVENTS

Specifies whether the origination of certain connection and disconnection events should be suppressed for this connector. The following events can be suppressed for their originator: New Connection, Existing Connection, Rebuild New Connection, Rebuild Existing Connection, and Discontinued or Failed Connection. Suppression of these events may provide a significant performance benefit at connect or disconnect time to connectors who do not need the information presented. See Suppressing Certain Events for a Connector.