Restarting a component of IMS
After performing the necessary recovery, you can reactivate the particular component that you shut down or detached. For example, if you take a database offline because of an I/O error and then recover it, you can again make it available to applications.
Use the appropriate IMS command to restart the component. Most often, this command is some form of the /START or UPDATE command. For example, use /START DATABASE or UPDATE DB START(ACCESS) to restart a database or /START PROGRAM to restart an application program.
A list of restart commands and their corresponding shutdown commands is shown in the following table:
| Restart command | Corresponding shutdown command | Affected components |
|---|---|---|
| /OPNDST | /CLSDST | VTAM® session |
| /START | /STOP /IDLE /DBDUMP /DBRECOVERY | Areas, databases, VTAM logons, lines, logical terminals, VTAM nodes, OLDS, programs, regions, external subsystem connection, transactions, users |
| /RSTART | /IDLE | Lines, physical terminals, logical links, VTAM nodes |
| /RELEASE | /HOLD | Conversations |
| /UNLOCK | /LOCK | Databases, logical terminals, nodes, programs, physical terminals, transactions |
| UPDATE | UPDATE | Areas, data groups, databases, MSC resources, and transactions. |