Space announcement We are no longer updating this space, and you cannot comment on this space. The IMAGE COPY PLUS component is now documented in BMC AMI Backup and Recovery for IMS.

Data set name construction for traditional image copies and Snapshot Copies

When dynamically allocating non-stacked output image copies, the utility constructs the data set name, using internal data set naming conventions, as follows:

  • The basic data set name looks like this: prefix.ICn.dbd.dsg

    • prefix is the value found in ICPREF or PREF keyword
    • n is the number (1-10) of copies that you want
    • dbd is the DBD name
    • dsg is the ddname of the data set group or area

    Important

    When the utility is constructing a data set name for a member of an IMS online reorganization (OLR) pair, the ICDSGAJ keyword controls the suffix used for the dsg portion of the data set name. For more information, see ICDSGAJ-keyword.

  • If you are creating volume copies, specified with VOLCOPY(Y), and the volume sequence number is greater than 1, the utility concatenates the volume sequence number to the basic data set name, and the data set name looks like this: prefix.ICn.dbd.dsg.S nnn S nnn is the volume sequence number for volumes 2 through n.
  • When the data set is a generation data group, specified with ICGDG(Y), the utility concatenates the GDG generation number, and the data set name looks like this: prefix.ICn.dbd.dsg(+1)
Warning

To prevent unwanted loss of output image copy data sets during dynamic allocation of non-stacked output image copies, you must specify a unique output data set name. If the name is not unique, the data set is overwritten. The disposition for an existing output image copy that is dynamically allocated is (OLD,KEEP) and the disposition for a non-existing output image copy is (NEW,CATLG).

The following table lists combinations used with the IC keyword and the data sets they construct.

Important

When you specify MERGE(N), the utility allocates the volume image copies as GDGs.

ICGDG

VOLCOPY

MERGE

Data set(s) constructed

N

N

—

prefix.ICn.dbd.dsg

Y

N

—

prefix.ICn.dbd.dsg(+1)

N

Y

N

prefix.ICn.dbd.dsg

prefix.ICn.dbd.dsg.Snnn

Y

Y

N

See Note

prefix.ICn.dbd.dsg(+1)

prefix.ICn.dbd.dsg.Snnn(+1)

Y

Y

Y

prefix.ICn.dbd.dsg(+1)

prefix.ICn.dbd.dsg.Snnn

Warning

If GDGs are preallocated, do not specify SYS, PLUS, and DFS prefixes. For performance reasons, ddnames with these prefixes cannot be used; they will be ignored.

Related topic

Determining-dynamically-allocated-data-set-names


 

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