Data Definition Language (DDL) Reference Manual (G06.24+)

Dictionary Database Structure
Data Definition Language (DDL) Reference Manual—426798-002
D-40
DICTRDF Fields
•
BUFFER-SIZE−buffer size of an unstructured file in bytes. BUFFER-SIZE
redefines BLOCK-SIZE. Value must be 512, 1,024, 2,048, or 4,096 bytes; the
default is 4,096 bytes.
•
BLOCK-SIZE-OBJECT−if block size is defined by a constant, contains the object
number of the constant; otherwise, it is 0.
•
BUFFER-SIZE-OBJECT−if buffer size is defined by a constant, contains the object
number of the constant; otherwise, it is 0.
•
ICOMPRESS−contains the ASCII character Y (yes) or N to indicate whether the
user has selected the index compression attribute for this file. The default for this
field is N.
•
DCOMPRESS−contains the ASCII character Y (yes) or N to indicate whether the
user has selected the data compression attribute for this file. The default for this
field is N.
•
MAXEXTENTS−the maximum number of extents this file can have. MAXEXTENTS
contains an integer between 1 and 978. The default value for MAXEXTENTS is
100.
•
MAXEXTENTS-OBJECT−if MAXEXTENTS is defined by a constant, contains the
object number of the constant; otherwise, it is 0.
•
BUFFERED−indicates the mode of handling write requests. BUFFERED can be
one of the following:
Y (yes)
N (no)
D (follow the default)
If you select Y, then write requests are buffered in the disk-process cache rather
than forced to disk at each request. The default value is Y for audited files, N for
nonaudited files.
•
AUDIT-COMPRESS−contains the ASCII character Y (yes) to indicate the audit-
checkpoint record is to be compressed or N (no) to indicate it is not to be
compressed. The audit-checkpoint record contains a copy of an audited data
record both before and after an update. The audit-checkpoint record is
compressed by omitting the unchanged portions of the data record. The default for
this field is N.
•
VERIFIED-WRITES−contains Y (yes) to indicate disk writes are verified or N (no)
to indicate they are not. The default for this field is N.
•
SERIAL-WRITES−contains Y (yes−serial) or N (no−parallel) to indicate whether
mirror disk writes are serial or parallel. The default for this field is N (parallel).
•
ODD-UNSTRUCTURED−contains Y (yes−odd unstructured) or N (no−even
unstructured) to indicate whether the file is to be created as odd unstructured or
even unstructured. The default for this field is Y (odd unstructured). For information