3.6 Definition of interleaving

An example of an interleave definition is shown below.

                                                    File source
Extent                                    ┌────────────┐
    FileInterleave  3 1             ┌←ASRC│AAAAAAAAAAAA│
        File  AFILE                 │     └────────────┘
            FileSource ASRC         │     ┌────────────┐           
            EndFileSource           ├←BSRC│BBBBBBBBBBBB│
        EndFile                     │     └────────────┘                
    EndFileInterleave               │
    FileInterleave  1 3             │  │←−−− Extent−−−→−−
       File  BFILE                  │  ┌────────────────              
           FileSource BSRC          └→ │AAABAAABAAABAAA
           EndFileSource               └────────────────                 
        EndFile               
    EndFileInterleave         
EndExtent                     

one View table

Title Command specifications

Command Start of extent definition

Keyword Extent

No 6.1

Format

Extent [relpos]

parameters

relpos: location on disk to record the extent (relative time within the session, optional)

function

Begins defining an extent.

one View table

Title Command specifications

Command End of extent definition

Keyword End Extent

No 6.2

Format

End Extent

parameters

none

function

Finish the extent definition.

one View table

Title Command specifications

Command Starting file interleaving definition

Keyword FileInterleave

No 6.3

Format

FileInterleave usize gsize

parameters

usize: number of sectors in the unit

gsize: number of sectors in the gap

function

Begins file interleaving definition.

one View table

Title Command specifications

Command End of file interleaving definition

Keyword EndFileInterleave

No 6.4

Format

EndFileInterleave

parameters

none

function

Finish the file interleaving definition.

one View table

Title Command specifications

Command Starting channel definition

Keyword Channel

No 6.5

Format

Channel channel

parameters

chno: Channel number (0 to 255)

function

Begin channel definition.

one View table

Title Command specifications

Command End of channel definition

Keyword EndChannel

No 6.6

Format

EndChannel

parameters

none

function

Finish the channel definition.

one View table

Title Command specifications

Command File relocation specification

Keyword Reallocation

No 6.7

Format

Reallocation

parameters

none

function

If another file is already specified at the location where you are trying to place the file, it will be moved and relocated so that it does not overlap with the previously specified file.