Converting to DFSMSrmm from CA-1

Chapter 3. Preparing the environment 95

Where:

CATSYNCH(NO) Specify CATSYNCH(NO) to force synchronization of the

DFSMSrmm control data set and user catalogs the next

time inventory management is run. See 1.1.9, “Catalog

synchronization” on page 41 for more information.

EXTENDEDBIN(YES) Enables DFSMSrmm extended bin support, which allows

the reuse of bins at the start of a move.

Extended bin support must be enabled if you want to use

the DFSMSrmm PARMLIB OPTION command

REUSEBIN(STARTMOVE) operand as shown in

Figure 3-4 on page 76 to reuse bins when a volume

moves from a bin.

3.1.9 Create the DFSMSrmm CDS as extended format

You can define the DFSMSrmm CDS as an extended format (EF) VSAM data

set. This function is enabled with APAR OW47639. The benefits available for

extended format data sets include:

 Data striping

 Data compression

 VSAM extended addressability

 Partial space release

 System-managed buffering

 CDS above 4 GB

Extended format enables you to define a CDS that uses VSAM Extended

Addressability (EA) to enable the CDS to grow above 4 GB.

Extended format data sets must be system-managed. The mechanism to request

extended format is through the SMS data class attribute Data Set Name Type,

specifying a value of EXT. For an extended format data set to be allocated using

extended addressability, the attribute Extended Addressability ... Y (see

Figure 3-27).

96 Converting to DFSMSrmm from CA-1

Figure 3-27 Data class specifying extended format

To define an extended format or extended addressability DFSMSrmm CDS, you

must include the DATACLAS keyword as shown in Example 3-13, and reference

the correct data class. For more information about how to reference a data class,

refer to DFSMS Access Method Services for Catalogs, SC26-7394.

Example 3-13 Sample JCL to create an extended format DFSMSrmm CDS

//LCLCDSAL JOB ,140.SCHLUMBERGER,NOTIFY=SCHLUM,

// MSGCLASS=H,CLASS=A,MSGLEVEL=(1,1)

//* ****************************************************************** *

//* STEP 1 Delete old DFSMSrmm control data set *

//* 2 Allocate a new DFSMSrmm control data set *

//* ****************************************************************** *

//STEP01 EXEC PGM=IDCAMS

//SYSPRINT DD SYSOUT=*

//SYSIN DD *

DELETE RMM.PROD.CDS CL

SET MAXCC = 0

/*

//STEP02 EXEC PGM=IDCAMS ALLOCATION MASTER FILE

//SYSPRINT DD SYSOUT=*

//MASTER DD DISP=SHR,UNIT=3390,VOL=SER=DFRMM4

//SYSIN DD *

DEFINE CLUSTER (NAME(RMM.PROD.CDS) -

FILE(MASTER) -

FREESPACE(15 0) -

KEY(56 0) -

REUSE -

DATA CLASS DEFINE Page 2 of 4

Command ===>

SCDS Name . . . : SYS1.SMS.SCDS

Data Class Name : EFKSDS

To DEFINE Data Class, Specify:

Data Set Name Type . . . . . . EXT (EXT, HFS, LIB, PDS or blank)

If Ext . . . . . . . . . . . R (P=Preferred, R=Required or blank)

Extended Addressability . . . Y (Y or N)

Record Access Bias . . . . . (S=System, U=User or blank)

Space Constraint Relief . . . . N (Y or N)

Reduce Space Up To (%) . . . (0 to 99 or blank)

Dynamic Volume Count . . . . (1 to 59 or blank)

Compaction . . . . . . . . . . (Y, N, T, G or blank)

Spanned / Nonspanned . . . . . (S=Spanned, N=Nonspanned or blank)