👁 0
Q: How to delete VSAM cluster?
Answer:
IDCAMS DELETE ds.name CLUSTER. Or DELETE ds.name FILE(ddname) if DD provided. PURGE overrides retention. ERASE clears data. DELETE removes catalog entry and data/index components.
👁 0
Q: What is PATHDISP parameter?
Answer:
PATHDISP=(normal,abnormal) for USS files. Options: KEEP, DELETE. PATHDISP=(KEEP,DELETE). Used with PATH parameter. Similar to DISP for MVS datasets. Controls USS file retention.
👁 0
Q: Explain SMS-managed storage
Answer:
SMS (Storage Management Subsystem) manages dataset placement. Specify STORCLAS, MGMTCLAS, DATACLAS in DD. DATACLAS sets DCB attributes, STORCLAS controls placement, MGMTCLAS defines retention. SMS uses ACS routines for assignment.
👁 0
Q: Explain LABEL parameter
Answer:
LABEL=(n,type) specifies tape label info. n=file sequence number. Type: SL=standard, NL=no labels, SUL=standard user. LABEL=(2,SL) is second file on standard label tape. EXPDT/RETPD for retention.
👁 0
Q: What is RETPD parameter?
Answer:
RETPD=nnn specifies retention days. Cannot delete until expired. EXPDT=yyddd for specific date. EXPDT=99365 or RETPD=9999 for permanent. Security software may override. Affects tape and disk datasets.
👁 0
Q: Explain EXPDT parameter?
Answer:
EXPDT=yyddd or EXPDT=yyyyddd expiration date. After this date, dataset can be deleted. EXPDT=99365 effectively permanent (1999 or 2099). RETPD alternative. Security software may enforce or override.
👁 0
Q: What is MGMTCLAS parameter?
Answer:
MGMTCLAS assigns SMS management class. Controls migration, backup, retention. MGMTCLAS=classname. Defines data lifecycle. HSM uses management class. Installation-defined policies.