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Operating OnLine 3-95
Add a Chunk
If you are allocating a raw disk device, you might need to specify an offset to
preserve track 0 information used by your UNIX operating system. Refer to
page 1-49 for further information about how to determine if you need an
offset.
If you are allocating cooked disk space, the pathname is a file in a UNIX file
system.
If you are logged in as user informix, you can make this change from within
DB-Monitor or from the command line. If you are logged in as root, you must
use the command-line option.
You can make this change while OnLine is in online mode. The newly added
chunk (and its associated mirror, if there is one) is available immediately.
From DB-Monitor
1. From within DB-Monitor, select the Dbspaces menu, Add_chunk
option to add a chunk.
2. Use the RETURN key or the arrow keys to select the blobspace or
dbspace that will receive the new chunk and press CTRL-B or F3.
The next screen that displays indicates whether the blobspace or
dbspace is mirrored. If it is, you must specify both a primary chunk
and mirror chunk.
3. Enter the complete pathname for the new primary chunk in the Full
Pathname
field of the primary chunk section.
4. Specify an offset in the Offset field if it is appropriate for your
device.
5. Enter the size of the chunk, in kilobytes, in the Size field.
6. If you are mirroring this chunk, enter the mirror chunk full
pathname, size, and optional offset in the mirror chunk section of the
screen.