The SHCDS parameters provide for these tasks:
- Listing information kept by the SMSVSAM server and the catalog
as related to VSAM RLS or DFSMStvs. Use:
- LISTDS
- LISTSUBSYS
- LISTSUBSYSDS
- LISTRECOVERY
- LISTALL
- LISTSHUNTED
- Controlling forward recovery, as well as preserving retained locks
when a data set is moved or copied; and, in rare cases when forward
recovery fails, deleting the locks. Use:
- FRSETRR
- FRUNBIND
- FRBIND
- FRRESETRR
- FRDELETEUNBOUNDLOCKS
- Allowing non-RLS updates when forward recovery is required. Use:
- PERMITNONRLSUPDATE
- DENYNONRLSUPDATE
- Removing the SMSVSAM server's knowledge of an inactive subsystem,
thus forcing a cold start of the online application. Use REMOVESUBSYS
only when procedures provided by the application have failed or you
have no intention of ever using the subsystem again.
- Resetting VSAM RLS indicators in the catalog, allowing reconstruction
of RLS information or fallback from VSAM RLS. (See z/OS DFSMSdfp Storage Administration for
the fallback procedure.) Use:
- CFREPAIR
- CFREPAIRDS
- CFRESET
- CFRESETDS
- CFQUIRSDS
- Taking action on work that DFSMStvs has shunted. Units of recovery
are shunted when DFSMStvs is unable to finish processing them, for
example, due to an I/O error. For each shunted log entry that exists,
the locks associated with that entry are retained. With retained locks,
unlike active locks, any attempts to obtain these locks by active
units of recovery are immediately rejected; return and reason codes
are displayed indicating that the operation failed.
z/OS DFSMS Access Method Services Commands
Copyright IBM Corporation 1990, 2014