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SMS Facilities For Data Set Allocation

SMS Facilities For Data Set Allocation . Chapter 13. Objectives. Knowledge objectives Describe how SMS manages file creation. Distinguish between the DD parameters only for SMS-managed data sets and those for non-SMS data sets while as SMS is active on the system.

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SMS Facilities For Data Set Allocation

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  1. SMS Facilities For Data Set Allocation Chapter 13 © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  2. Objectives • Knowledge objectives • Describe how SMS manages file creation. • Distinguish between the DD parameters only for SMS-managed data sets and those for non-SMS data sets while as SMS is active on the system. • Describe the functions of class. • List advantages a PDSE has over a PDS • Name the DD parameter used to create a PDSE. • Distinguish between the REFDD parameter and the LIKE parameter. © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  3. Objectives • Applied objectives • Code DD parameters to create an SMS-managed data set by: • Assigning specific storage, data, and management classes to the data set • Letting the ACS routines assign classes to the data set • Code DD parameters to perform these functions if SMS is active on the system: • Allocate the space for a new data set interms of records • Model a new data set after an existing data set © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  4. Coding for SMS • How SMS manages creation of a new data set • The complete DD statement for a data set • This illustrates SMS parameters in the DD statement • Parameters for SMS-managed data sets • Parameters used for non-SMS data sets or SMS data sets //TRANS DD DSNAME=MM01.AR.TRANS,DISP=(NEW,CATLG) AVGREC Specifies (1) the space allocation is based on record size and (2) number of records used per extent. LIKE Copies data set characteristics from a specified data set. REFDD Refers back to a DD statement to copy characteristics. STORCLAS Specifies the storage class for a data set. DATACLAS Specifies the data class for a data set. MGMTCLAS Specifies the management class for a data set. DSNTYPE Allows you to specify the type of data set being created. © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  5. SMS Code Samples //TRANS DD DSNAME=MM01.AR.TRANS, // DISP=(NEW,CATLG),// UNIT=SYSDA,VOL=SER=MPS8BV,// SPACE=(1000,(5,3), // RLSE),AVGREC=U,// DCB=(RECFM=FB,LRECL=120) • To create an SMS-managed data set • A DD statement that lets ACS routines choose the classes • A DD statement that specifies the data class • To create a data set not managed by SMS //TRANS DD DSNAME=MM01.AR.TRANS,DISP=(NEW,CATLG) //TRANS DD DSNAME=MM01.AR.TRANS,DISP=(NEW,CATLG), // DATACLAS=TRAN2 © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  6. Storage Class • The syntax for STORCLAS parameter • A DD statement setting storage class to MVPS100 STORCLAS=storage-class-name //TRANX DD DSNAME=MM01.TRANS.NEW,// DISP=(NEW,CATLG),// STORCLAS=MVPS100 © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  7. Storage Class Examples • The syntax for the DATACLAS parameter • A DD statement that sets the data class to MVPD050 • A DD statement that overrides the SPACE and LRECL parameters of the data class DATACLAS=data-class-name //TRANX DD DSNAME=MM01.TRANS.NEW,DISP=(NEW,CATLG),// DATACLAS=MVPD050 //TRANX DD DSNAME=MM01.TRANS.NEW,DISP=(NEW,CATLG),// DATACLAS=MVPD050,SPACE=(TRK(1,1)),// LRECL=1000 © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  8. Management Class Examples • The syntax for the MGMTCLAS parameter • This DD statement sets class to MVPM010 MGMTCLAS=management-class-name //TRANX DD DSNAME=MM01.TRANS.NEW, // DISP=(NEW,CATLG),// MGMTCLAS= MVPM010 © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  9. DSNTYPE= {LIBRARY} {PDS} Additional Parameters • The syntax for the DSNTYPE parameter • A DD statement creating a PDSE //TRANERR DD DSNAME=MM01.LIB.ERR(TRANERR),// DISP=(NEW,CATLG),// DSNTYPE=LIBRARY © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  10. {U}AVGREC= {K} {M} Additional Parameters (2) • The syntax for the AVGREC parameter • A DD statement that uses the AVGREC parameter //TRANS DD DSNAME=MM01.AR.TRANS,DISP=(NEW,CATLG),// UNIT=SYSDA,VOL=SER=MPS8BV,// SPACE=(120,(5,3)),AVGREC=K © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  11. //STEP1 EXEC PGM=TRNSPR1//ARTRANS DD DSNAME=MM01.AR.TRANX,DISP=(NEW,CATLG),// UNIT=SYSDA,VOL=SER=MPS8BV,// SPACE=(TRK,(5,3),RLSE),// DCB=(RECFM=FB,LRECL=120)//STEP2 EXEC PGM=TRNSPR2//ROTRANS DD DSNAME=MM01.RO.TRANX,DISP=(NEW,CATLG),// UNIT=SYSDA,REFDD=*.STEP1.ARTRANS Model data set Additional Parameters (3) • The syntax for the REFDD and LIKE parameters • Using the REFDD parameter to model a new data set after one defined earlier • Using the LIKE parameter to model a new data set after a cataloged data set REFDD=*.stepname.ddname LIKE=model-dataset-name //STEP1 EXEC PGM=TRNSPR1//TRANS DD DSNAME=MM01.AP.TRANS,DISP=(NEW,CATLG),// UNIT=SYSDA,LIKE=MM01.AR.TRANS,// SPACE=(TRK,(1,1)) © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

  12. End Presentation © 2002 - Mike Murach & Associates, 2007 - HCC, IBM

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