How to increase the block size of a Librarian Master file

Products

• Librarian

Issue/Introduction

Recently getting module too large to process messages and notice that if the block size of the master file is increased these messages are eliminated. 

What is the easiest way to increase the blocksize of Librarian Master files?

Environment

 Release: 4.4

Resolution

1.  Using the sample JCL below the master file is backed up to a temporary master file with the new block size specified in the DCB parameter. 

//S1      EXEC PGM=AFOLIBR,PARM='NRJS,NJTA' 
//SYSPRINT DD SYSOUT=* 
//OSJOB    DD DUMMY 
//LIST     DD SYSOUT=* 
//INDEX    DD SYSOUT=* 
//MASTER   DD DSN=your.master.file,DISP=SHR 
//BACKUP   DD DSN=your.temp.master,DISP=(,CATLG), 
//            DCB=(BLKSIZE=nnnnn,DSORG=DA), 
//            SPACE=(CYL,(nnn)),VOL=SER=nnnnnn,UNIT=SYSDA 
//SYSIN  DD * 
-OPT BKUPDISK,INDEX 
/*

 

2.  Rename the original master file in ISPF to .OLD

3.  Rename the temporary master file to the original name.