The DCB parameters specified for this data set are RECFM=FBA and LRECL=133. The block size may be provided on the SYSPRINT DD statement and must be a multiple of 133. The default is 133.
The MVS™ image in which DFHJUP runs must be a member of the same sysplex as the MVS image in which the log stream was created. It is not necessary for the CICS® region(s) that created the log stream, or any CICS region, to be running in the same MVS image as DFHJUP.
DASD-only log streams have the added restriction that they cannot be shared between MVS images; they can only be accessed from one MVS image at a time (although multiple connections are permitted from that MVS image). This means that if a DASD-only log stream is being accessed from a particular MVS image in the sysplex (for example, by a CICS region), DFHJUP must also run in that MVS image. If the DASD-only log stream is not currently being accessed, DFHJUP can run in any of the MVS images in the sysplex.
The SUBSYS=(LOGR,DFHLGCNV,...) keyword identifies the DD statement as referring to a CICS log stream. You must specify SUBSYS keyword in any program that you use to examine and manipulate data in log streams; DFHJUP is the supplied program but you can use your own program to perform equivalent functions. See SUBSYS=(LOGR,DFHLGCNV,...) keyword for information about the SUBSYS keyword.
The DCB parameter BLKSIZE=32760 must be specified on the input data DD statement if you are processing journal records on a log stream.
These data sets must be standard labeled files, either DASD or tape. They must be a physical sequential data sets (DSORG=PS). If a file with RECFM=U is used, the DCB BLKSIZE parameter must be specified.
The default ddname is SYSUT1.
An example of a DD statement, using a variable block type of journal, is as follows:
//SYSUT1 DD DSNAME=CICSLOG,DISP=(OLD,KEEP),
// DCB=RECFM=VB
The second example shows the use of the BLKSIZE parameter:
//SYSUT1 DD DSNAME=CICSLOG,DISP=(OLD,KEEP),
// DCB=RECFM=VB,BLKSIZE=32760
DFHJUP sets the RECFM of this data set equal to the RECFM specified for the input data set. This is also done for LRECL and BLKSIZE if not specified.
The default ddname used is SYSUT4.