Advanced Topics › Communication Methods › Cross-system Communication Methods › Virtual Control File Communication Methods › XCF Communication Method › Implementing XCF Communication

Implementing XCF Communication

To implement the XCF communication method, you customize certain parameters in the MIMINIT member.

To select the XCF communication method

In the MIMINIT member,

1. Define all systems participating in the MIMplex using the DEFSYS statement:

   DEFSYS (sysa,aa,sysa),(sysb,bb,sysb)
   

2. Define the VCF recovery options and master candidate list:

   GLOBALVALUE ANYELIGIBLE=yes/no,
               MOSTPREFERRED=yes/no,
               NOMASTER=wait/term,
               VCFMASTER=(sysa,sysb,...,sysn)
   

3. Define the XCF communication method:

   MIMINIT COMMUNICATION=XCF
   

4. Define the name for the CA MIM complex:

   MIMINIT MIMPLEX=complexname
   

5. Define checkpoint files for use by each system:

   IFSYS sysa
     MIMINIT CHKPTDSN=sysa.dsn
   ENDIF
   IFSYS sysb
     MIMINIT CHKPTDSN=sysb.dsn
   ENDIF
   

   Alternatively, you can use the ALLOCATE command placed in the MIMINIT member to define the checkpoint files to be used by each system:

   IFSYS sysa
     ALLOCATE DDNAME=MIMCKP00,DSNAME=sysa.primckpt
     ALLOCATE DDNAME=MIMCKP01,DSNAME=sysa.altckpt
   ENDIF
   IFSYS sysb
     ALLOCATE DDNAME=MIMCKP00,DSNAME=sysb.primckpt
     ALLOCATE DDNAME=MIMCKP01,DSNAME=sysb.altckpt
   ENDIF
   

Note: For more information, see the CA MIM Statement and Command Reference Guide.