ABCs of z/OS System Programming Volume 3 - IBM Redbooks

5.29 Setting the low-level qualifier (LLQ) standards
LLQ naming standards:
ExpDays Max Migrate Cmd/ Retain Retain
Low-Level Non- Ret Partial Days Auto No.GDG Backup Backup Days Day
Qualifier usage Period Release Non-usage Migrate Primary Freqcy Versns OnlyBUP ExtraBUP
ASM...... NOLIM NOLIM YES 15 BOTH -- 0 5 1100 120
CLIST.... NOLIM NOLIM YES 15 BOTH -- 0 5 1100 120
COB*..... NOLIM NOLIM YES 15 BOTH -- 0 5 1100 120
CNTL..... NOLIM NOLIM YES 15 BOTH -- 0 5 1100 120
DATA..... 400 400 YES 15 BOTH -- 2 2 400 60
*DATA.... 400 400 YES 15 BOTH -- 2 2 400 60
FOR*..... NOLIM NOLIM YES 15 BOTH -- 0 5 1100 120
INCL*.... NOLIM NOLIM YES 15 BOTH -- 0 5 1100 120
INPUT.... 400 400 YES 15 BOTH -- 2 2 1100 120
ISPROF... 400 400 YES 30 BOTH -- 0 2 60 30
JCL...... NOLIM NOLIM YES 15 BOTH -- 0 5 1100 120
LIST*.... 2 2 YES NONE NONE -- NONE NONE -- --
*LIST.... 2 2 YES NONE NONE -- NONE NONE -- --
LOAD*.... 400 400 YES 15 BOTH -- 1 2 -- --
MACLIB... 400 400 YES 15 BOTH -- 1 2 400 60
MISC..... 400 400 YES 15 BOTH -- 2 2 400 60
NAMES.... NOLIM NOLIM YES 15 BOTH -- 0 5 1100 120
OBJ*..... 180 180 YES 7 BOTH -- 3 1 180 30
PLI...... NOLIM NOLIM YES 15 BOTH -- 0 5 1100 120
Figure 5-29 Setting the LLQ standards
Setting the low-level qualifier (LLQ) standards
The LLQ determines the contents and storage management processing of the data. You can
use LLQs to identify data requirements for:
► Migration (data sets only)
► Backup (data sets and objects)
► Archiving (data sets)
► Retention or expiration (data sets and objects)
► Class transitions (objects only)
► Release of unused space (data sets only)
Mapping storage management requirements to data names is especially useful in a
system-managed environment. In an environment without storage groups, data with differing
requirements is often segregated onto separate volumes that are monitored and managed
manually. LLQ data naming conventions allow data to be mixed together in a
system-managed environment and still retain the separate management criteria.
Figure 5-29 shows examples of how you can use LLQ naming standards to indicate the
storage management processing criteria.
The first column lists the LLQ of a data name. An asterisk indicates where a partial qualifier
can be used. For example, LIST* indicates that only the first four characters of the LLQ must
be LIST; valid qualifiers include LIST1, LISTING, and LISTOUT. The remaining columns show
the storage management processing information for the data listed.
Chapter 5. System-managed storage 291