The NSC segment can be used to request the start-up, shut-down, and/or migration (to a different cpu or file-server/file-system) of a particular application. It can also be used in an unsolicited update from one system to another to announce the start-up, shut-down, or migration of an application.
Figure C-3. NSC attributes
SEQ |
LEN |
DT |
R/O |
RP/# |
TBL# |
ITEM# |
ELEMENT NAME |
1 |
4 |
IS |
R |
0333 |
01188 |
Network Change Type |
|
2 |
30 |
ST |
01189 |
Current CPU |
|||
3 |
30 |
ST |
01190 |
Current Fileserver |
|||
4 |
30 |
ST |
01191 |
Current Application |
|||
5 |
30 |
ST |
01192 |
Current Facility |
|||
6 |
30 |
ST |
01193 |
New CPU |
|||
7 |
30 |
ST |
01194 |
New Fileserver |
|||
8 |
30 |
ST |
01195 |
New Application |
|||
9 |
30 |
ST |
01196 |
New Facility |
C.2.3.0 NSC field definitions
Definition: This field contains the type of change being requested (if NMR query) or announced (if NMD unsolicited update). Refer to user-defined table 0333 - Network change type for suggested values. Implies that "new" version starts up with no loss or duplication of data as old one is shutting down (if possible).
User-defined Table 0333 - Network change type
Value |
Description |
SU |
Start up |
SD |
Shut down |
M |
Migrates to different CPU |
Definition: This field contains a site-specific name for the current CPU.
Definition: This field contains a site-specific name for the current fileserver or file system used by this application.
Definition: This field contains a site-specific name available to identify the "current" application process used for interfacing with lower level protocols. To be used in conjunction with the sending/receiving system and facility values in the MSH.
Definition: This field contains a site-specific name for the current facility used by this application. To be used in conjunction with the values for the sending/receiving system and facility values in the MSH.
Definition: This field contains a site-specific name for the new CPU.
Definition: This field contains a site-specific name for the new fileserver or file system used by this application.
Definition: This field contains a site-specific name available to identify "new" application processes used for interfacing with lower level protocols. To be used in conjunction with the sending/receiving system and facility values in the MSH.
Definition: This field contains a site-specific name for the new facility used by this application. To be used in conjunction with the values for the sending/receiving system and facility values in the MSH.
Fields 2-9. These are not applicable ("n/a") when the type of change being requested or reported is start-up or shut-down. If the change is of type "M", at least one of fields 2-5 must be different from its corresponding field in range 6-9.
Fields 4-5, 8-9. See definitions for the MSH, message header segment, in Chapter 2, (Control Section), for fields 3-4, for system and facility. "Application" is available for interfacing with lower level protocols. "Facility" is entirely site-defined.
Fields 2-3, 6-7. Entirely site-defined.