Internal Coupling Facility (ICF)

February 28, 2011 Rui Miguel Feio

ICFs are PUs in a CPC configured to run only CFCC code. The PUs are not shipped with a fixed function assignment, but are assigned during power-on reset (POR) or later non-disruptively by on demand offerings such as: CBU, CUoD, CIU, ON/OFF CoD.   Those offerings allow the customer to […]

Coupling Facility (CF)

February 22, 2011 Rui Miguel Feio

A coupling facility is a special logical partition that runs the coupling facility control code (CFCC) and provides high-speed caching, list processing, and locking functions in a sysplex. HCD enables you to specify whether a logical partition can be a coupling facility, operating system, or either on certain processors. You […]

External Time Reference (ETR)

February 21, 2011 Rui Miguel Feio

External Time Reference hardware facility (ETR) is the generic name for IBM Sysplex Timer. The ETR architecture provides the means of synchronizing TOD clocks in different CPCs with a centralized time reference, which in turn can be set accurately on the basis of UTC time standard (External Time Source). The […]

Cross-System Coupling Facility (XCF)

February 21, 2011 Rui Miguel Feio

The cross-system coupling facility (XCF) component of z/OS manages communications between applications in a sysplex. XCF services allow authorized programs in a sysplex to communicate with programs on the same MVS system or other MVS systems. If a system fails, XCF services also provide the capability for batch jobs and […]

Create a History Data Set from Log Data Recorded on the Logrec Log Stream

February 21, 2011 Rui Miguel Feio

The following JCL creates a history data set from log data recorded on the Logrec log stream //LOGRECHS JOB,MSGLEVEL=(1,1),MSGCLASS=X,NOTIFY=&SYSUID //EREPDALY EXEC  PGM=IFCEREP1,PARM=(‘HIST,ACC=Y,SYSUM’) //ACCIN    DD DSN=SYS1.SYSPLEX.LOGREC, //            SUBSYS=(LOGR,IFBSEXIT,,’DEVICESTATS,LASTRUN’), //            DCB=(RECFM=VB,BLKSIZE=4000) //ACCDEV   DD DSN=MVS.LOGREC.LGSTREAM.HISTORY, //            DISP=(NEW,CATLG), //            DCB=(RECFM=VB,BLKSIZE=4000), //            UNIT=SYSDA,SPACE=(CYL,(25,5)) //SERLOG   DD DUMMY //DIRECTWK DD UNIT=SYSDA,SPACE=(CYL,15,,CONTIG) //TOURIST  DD SYSOUT=A,DCB=BLKSIZE=133 //EREPPT   DD SYSOUT=A,DCB=BLKSIZE=133 […]

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