DEALLOC PERIOD field (DEALLCT subsystem parameter)

The DEALLCT subsystem parameter determines the length of time that an archive read tape unit is to be allowed to remain unused before it is deallocated.

Acceptable values: minutes,seconds, 1440, NOLIMIT
Default: 0
Update: option 43 on panel DSNTIPB
DSNZPxxx: DSN6LOGP DEALLCT
minutes,seconds
Start of changeSets the amount of time before deallocation as the specified number of minutes (0–1439) and number of seconds (0–59). Separate the number of minutes and number of seconds with a comma and no spaces.End of change
Start of changeNOLIMIT or 1440End of change
Start of changeSets no limit on the amount of time before deallocation. Specifying NOLIMIT or 1440 allows maximum optimization opportunities.End of change
Recommendation: If you are not using data sharing and your archive log data is on tape, set this value high enough to allow Db2 to optimize tape handling for multiple read applications. When all tape reading is complete, you can update this option with the SET ARCHIVE command. If you are using data sharing, tapes should be deallocated quickly to avoid deadlocks. If Db2 is running in data sharing mode, it is strongly recommended that you use disk archive logs, not tape archive logs.

Examples

Assume that you want the deallocation period to be 30 seconds. Enter 0,30.

Assume that you want the deallocation period to be 23 minutes and 47 seconds. Enter 23,47.