The following CVAF events
are traced. The heading names such as
'Write DSCB to VTOC' are the names used by IPCS to describe each record.
- Write DSCB to VTOC
Recorded when CVAF writes a DSCB to the
VTOC. Trace data includes the VOLSER and DSCB. Recorded by module ICVDSD01
and ICVDSD02. Restriction: CVAF does not
write format-0 and format-4 DSCBs. Therefore, no trace record is created
for them.
- Write VIR to VTOC index
Recorded when a VTOC index record (VIR)
is written to the VTOC index. Trace data includes the VOLSER and Dataset
Name and 1 or more VTOC information records (VIRs). Recorded by module
ICVCMI00
- Add Index
Recorded when a data set name and a CCHHR pointer
are added to the VTOC index. Trace data includes the VOLSER and DSNAME.
Recorded by module ICVIXA00
- Delete Index
Recorded when a data set name is deleted from
the VTOC index. Trace data includes the VOLSER and DSNAME. Recorded
by module ICVIXD00
- Allocate Space from VPSM
Recorded when space on the volume
is allocated from the volume pack space map (VPSM). If the space
request fails, the trace record is not written. Trace data includes
the VOLSER and the Extent Descriptor Table (recorded in a second trace
record). Recorded by module ICVDMS01
- Release Space from
VPSM
Recorded when space on the volume is
released from the volume pack space map (VPSM). Trace data includes
the VOLSER and the Extent Descriptor Table (recorded in a second trace
record). Recorded by module ICVDMS01
- Allocate VTOC Index
Space
Recorded when a VTOC index record
is allocated and marked in the VTOC index map (VIXM) as available
for allocation. Trace data includes the VOLSER and CCHHR. Recorded
by module ICVDMS02
- Release VTOC Index Space
Recorded when a VTOC index record
is released and marked in the VIXM as unavailable for subsequent allocation.
Trace data includes the VOLSER and CCHHR. Recorded by module ICVDMS02
- Allocate VTOC Space
Recorded when a format-0 DSCB is allocated;
the VTOC map of DSCBs (VMDS) is updated to indicate that the DSCB
is allocated. Trace data includes the VOLSER and CCHHR. Recorded by
module ICVDMS02
- Release VTOC Space
Recorded when a DSCB (all formats) is released
and marked in the VMDS as unallocated. Trace data includes the VOLSER
and CCHHR. Recorded by module ICVDMS02
- CVAF Entry
Recorded on entry to CVAF module ICVCMM00. Trace
data includes the CVAF parameter list (CVPL). Recorded by module ICVMM00.
- CVAF Exit
Recorded on exit from CVAF module ICVCMM00. Trace
data includes the CVAF parameter list (CVPL). Recorded by module ICVCMM00.
- Read or Write multiple DSCBs
Recorded when CVAF
reads or writes multiple DSCBs to the VTOC. Trace data includes the
VOLSER and DSCB and 1 or more DSCB processed by this CVAF request.
Recorded by module ICVDSD02.