ISAM

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# ISAM

#### ISAM Files and Sequential Files - File Types M and S

        13:46:54             *****  P R E D I C T  *****             2007-05-31
                                       - Modify file -
        File ID ......... HNO-M                           Modified 2007-05-31 at 13:04
        Type ............ ISAM file                             by HNO
        File number ..... 1
        Contained in DA .
        Keys ..                                                                Zoom: N

        Literal name .....
        Average count ....
        Stability .......*   Not specified
        Data set attributes
          External name ..                                                     Zoom: N
          Organisation             Size definition             Location
            Type ......*             Unit .........*             Device ....
            Recfm .....*             Primary .......             Volume 1 ..
            Recsize ....             Secondary .....             Volume 2 ..
            Blksize ....             Dir blocks ....             Volume 3 ..
                                     Rounded up .... N (Y/N)     Volume 4 ..
                                     Contiguous .... N (Y/N)     Volume 5 ..
        Abstract     Zoom: N

          Additional attributes ..* N          Associations ..* N

Note
Parameters not listed below are described in other sections of this documentation: Parameters common to all object types, for example Keys, are described under Global Attributes. Parameters common to all file types, for example Literal name, are described under Common File Attributes. See also Common Parameters for SQL File Types.

Parameters
Data Set Attributes
External name | Name of the physical file in operating system. Up to 250 characters can be specified (using the Zoom option).
Organization
Type |
The organization of the data set:
DA | Direct access
PO | Partitioned
PS | Sequential
blank | None of the above applies
Recfm |
The record format of the file:
F | Fixed
FB | Fixed block
FS | Fixed block standard
V | Variable
VB | Variable blocked
VS | Variable blocked standard
U | Undefined
blank | None of the above applies
Recsize | The record size of the file.
Blksize | The block size of the file.
Size Definition
Unit |
The units in which storage space has been allocated to the file:
BL | Blocks
CY | Cylinders
TR | Tracks
Primary | The number of units of storage space allocated to the primary extent of the file.
Secondary | The number of units of storage space allocated to the secondary extent of the file.
Dir blocks | The number of blocks reserved for the directory of the file.
Rounded up |
Y | Each space allocation is rounded up to full cylinders.
Contiguous |
Y | The space allocated to the secondary extent of the file is contiguous with the space allocated to the primary extent.
Location
Device | The type of storage device on which the file is located.
Volume 1 - 5 | The volume(s) on which the file is located. Up to five volumes can be specified.