How to: Avoid refreshing shared read-only base libraries multiple times
Running the KCIJPLOD load job is part of most maintenance scenarios. For sharing-with-base environments, this job loads both the LPAR-unique libraries and the common shared base libraries by default. The RTE_LOAD_SHARED_LIBS parameter in the configuration profile of each runtime environment controls whether or not the base libraries are loaded. If you have multiple runtime environments sharing the same base libraries, to avoid loading the base libraries multiple times designate one environment to load the base libraries by leaving its flag set to Y, and disable loading of base libraries in all the others.
About this task
Procedure
To disable loading of base libraries in sharing runtime
environments, locate the RTE_LOAD_SHARED_LIBS parameter in the configuration
profile and set its value to N:
IBM.ITM62351.LPAR1.WCONFIG(LPAR1)
Command ===> Scroll ===> CSR
000358 ** Runtime environment (RTE) settings:
000359 ** Specify the name of the RTE in the RTE_NAME parameter if this RTE
000360 ** is not enabled for System Variables (RTE_SYSV_SYSVAR_FLAG=N).
000361 RTE_NAME LPAR1
000362
000365 ** Type of RTE:
000366 ** There are three types of RTEs:
000367 ** FULL - Allocates Image-specific and Base libraries.
000368 ** SHARING - Allocates Image-specific libraries and shares Base
000369 ** libraries with another RTE or SMP/E target libraries.
000370 RTE_TYPE SHARING * FULL, SHARING *
000381 ** If RTE high-level qualifier of the production runtime (RK*)
000382 ** libraries is different from PARMGEN RTE_PLIB_HILEV qualifier,
000383 ** then specify. Otherwise, default is the PARMGEN RTE_PLIB_HILEV
000384 ** qualifier. For an ICAT-to-PARMGEN converted RTE, RTE_HILEV and
000385 ** RTE_VSAM_HILEV are set to the same RTE HLQ previously used
000386 ** prior to conversion.
000387 RTE_HILEV IBM.ITM62351
000388 RTE_VSAM_HILEV IBM.ITM62351
000389
000390 ** Required if RTE_TYPE is SHARING:
000391 ** Specify the Non-VSAM HLQ in the "RTE_X_HILEV_SHARING" of the
000392 ** RTE being shared to by LPAR1 RTE.
000393 ** For RTE_SHARE parameter, specify "SMP" value if this RTE is sharing
000394 ** with SMP/E target libraries.
000395 ** Otherwise, specify the name of the shared-to RTE in the "RTE_SHARE"
000396 ** parameter.
000397 RTE_X_HILEV_SHARING "IBM.ITM62351"
000398 RTE_SHARE "BASEA"
000400 ** (Optional) Only valid when RTE_TYPE is SHARING, and RTE_SHARE is
000401 ** not SMP. Specify "Y" to include shared runtime datasets in the
000402 ** RTE Load job.
000403 RTE_LOAD_SHARED_LIBS "Y"
Important: In sharing runtime environments where RTE_LOAD_SHARED_LIBS has been set to
N, some of the IEBCOPY steps that refresh the read-only libraries are not
generated as part of the KCIJPLOD job. However, these steps are generated in the KCIJPLOD job for
the runtime environment where RTE_LOAD_SHARED_LIBS has been set to Y.
Examples of these types of IEBCOPY steps that will not be generated are as
follows.
EDIT IBM.ITM62351.LPAR1.WKANSAMU(KCIJPLOD)
Command ===>
000356 //KANEXEC EXEC PGM=IEBCOPY,REGION=0M
000357 //SYSPRINT DD SYSOUT=*
000358 //TKANEXEC DD DISP=SHR,
000359 // DSN=IBM.ITM62351.TKANEXEC
000360 //RKANEXEC DD DISP=SHR,
000361 // DSN=IBM.ITM62351.BASEA.RKANEXEC
000362 //SYSUT3 DD UNIT=3390,SPACE=(TRK,(15,15))
000363 //SYSUT4 DD UNIT=3390,SPACE=(TRK,(15,15))
000364 //SYSIN DD *
000365 COPY INDD=((TKANEXEC,R)),OUTDD=RKANEXEC
000366 COPY INDD=RKANEXEC,OUTDD=RKANEXEC
000367 /*
000368 //KANOSRC EXEC PGM=IEBCOPY,REGION=0M
000369 //SYSPRINT DD SYSOUT=*
000370 //TKANOSRC DD DISP=SHR,
000371 // DSN=IBM.ITM62351.TKANOSRC
000372 //RKANOSRC DD DISP=SHR,
000373 // DSN=IBM.ITM62351.BASEA.RKANOSRC
000374 //SYSUT3 DD UNIT=3390,SPACE=(TRK,(15,15))
000375 //SYSUT4 DD UNIT=3390,SPACE=(TRK,(15,15))
000376 //SYSIN DD *
000377 COPY INDD=((TKANOSRC,R)),OUTDD=RKANOSRC
000378 COPY INDD=RKANOSRC,OUTDD=RKANOSRC
000379 /*
000380 //KANWENU EXEC PGM=IEBCOPY,REGION=0M
000381 //SYSPRINT DD SYSOUT=*
000382 //TKANWENU DD DISP=SHR,
000383 // DSN=IBM.ITM62351.TKANWENU
000384 //RKANWENU DD DISP=SHR,
000385 // DSN=IBM.ITM62351.BASEA.RKANWENU
000386 //SYSUT3 DD UNIT=3390,SPACE=(TRK,(15,15))
000387 //SYSUT4 DD UNIT=3390,SPACE=(TRK,(15,15))
000388 //SYSIN DD *
000389 COPY INDD=((TKANWENU,R)),OUTDD=RKANWENU
000390 COPY INDD=RKANWENU,OUTDD=RKANWENU
000391 /*