z/OS V1R8 DFSMS Technical Update - IBM Redbooks

Figure 3-2 shows an example of z/OS V1R8 LISTCAT LEVEL output illustrating the header
and ALIAS changes.
LISTCAT LEVEL(SYSDOC)
LISTING FROM CATALOG -- COMCIC.ICFCAT
GDG BASE ------ SYSDOC.CIMN.SYSLOGD
IN-CAT --- COMCIC.ICFCAT
NONVSAM ------- SYSDOC.CIMN.SYSLOGD.G0832V00
IN-CAT --- COMCIC.ICFCAT
.
.
.
IDCAMS SYSTEM SERVICES TIME:
17:04:40
LISTING FROM CATALOG -- SCI18A.DASDPLEX.CATALOG
ALIAS --------- SYSDOC
IN-CAT --- SCI18A.DASDPLEX.CATALOG
IDCAMS SYSTEM SERVICES TIME:
17:04:40
LISTING FROM SELECTED CATALOGS
THE NUMBER OF ENTRIES PROCESSED WAS:
AIX -------------------0
ALIAS -----------------1
CLUSTER ---------------0
Figure 3-2 z/OS V1R8 LISTCAT output
Migration and coexistence
Information APAR II14250 contains details about the differences in IDCAMS LISTCAT
processing in z/OS V1R8. This is generally not a consideration unless, for example, you have
a vendor product that processes LISTCAT output.
Maintenance
We recommend that you have the PTFs for APARs OA16912, OA18720, and OA20169
applied prior to using the new support. In addition, the PTF for APAR OA16372 should be
applied.
OA16912 and OA18720 represent the roll-up APARs for this new support. APAR OA20169 is
the APAR resulting from OA18184’s PTF being marked PE. It is not closed at the time of this
writing, but is important because it fixes the PE introduced with OA18184 as well as the issue
OA18184 was intended to fix, where LISTCAT was not issuing error messages for offline
volumes.
OA16372 represents VSAM GET/PUT requests failing when accessing a VSAM data set and
the data set has more than three volumes that have been recataloged out of the original
extend order. Refer to “OA16372” on page 468 for a full description.
3.1.2 Dynamic service count
z/OS V1R8 introduces the ability to alter the number of catalog address space service tasks
available for user requests. An insufficient number of service tasks is usually indicated by
running a MODIFY CATALOG,REPORT command and observing a HIGHEST # OF
SERVICE TASKS value approaching the SERVICE TASK UPPER LIMIT value. Exceeding
the limit results in performance problems.
Chapter 3. DFSMSdfp V1R8 enhancements 15