StorageTek 312564001 Manual De Usuario
66
DB2 Manager User Guide
StorageTek
Proprietary
Record descriptor section
The SMF header section is immediately followed by the DB2 Manager record
descriptor section. It has a fixed length of 38 bytes.
descriptor section. It has a fixed length of 38 bytes.
Offset Length Format Description
18 6 bin
Reserved.
24
4
bin
Offset of database section. This is the
offset from the start of the SMF record
of the database section of the record.
offset from the start of the SMF record
of the database section of the record.
28
2
bin
Length of database section. This is the
length in bytes of a single database
section.
length in bytes of a single database
section.
30
2
bin
The number of database sections
present in the record (always = 1).
present in the record (always = 1).
32
4
bin
Offset of request section. This is the
offset from the start of the SMF record
of the first request section in the record.
offset from the start of the SMF record
of the first request section in the record.
36
2
bin
Length of request section. This is the
length in bytes of a single section. This
will always be 96 bytes.
length in bytes of a single section. This
will always be 96 bytes.
38
2
bin
The number of request sections
present in the record.
present in the record.
40
16
-
Reserved for future use.
Database section
The storage group section starts at the offset specified in the record
descriptor section of the DB2 Manager SMF record. It gives information about
the database being processed for object storage or retrieval. It has a fixed
length of 24 bytes. Only one database group section will be present per SMF
record.
descriptor section of the DB2 Manager SMF record. It gives information about
the database being processed for object storage or retrieval. It has a fixed
length of 24 bytes. Only one database group section will be present per SMF
record.
Offset Length Format Description
0
1
Char
DB2 Manager task issuing request:
’T’ – tape reader task
’D’ – disk reader task
’W’ – tape writer task
’T’ – tape reader task
’D’ – disk reader task
’W’ – tape writer task